There are two ways: If you’re editing the actual text, you use the circle or square in the top-right corner; or, if you’re not actually editing the contents of a text block, you can stil
Trang 1You can edit any drawn shape in the same manner in which you drew lines
with the Pen tool in the preceding task You just select a shape by using the
Subselect tool (the white arrow at the top right of the Tools panel), and you
see the same handles and anchor points as in the preceding task
Creating Text
Now for a graphic element that involves neither line nor fill In this section,
you explore creating text To create text, you simply select the Text tool,
click, and start typing When you first make the text, if you click and drag,
you are setting the margins; otherwise, the margins adapt to what you’re
typing You can modify the font, color, and style of what you’ve typed after
you create it Modifying your text after it’s typed usually makes sense
be-cause then you are able to best judge how it looks
Creating text in Flash has never been easier or more sophisticated The
fol-lowing task walks you through a couple quick maneuvers
Use the Pen Tool
TRY IT YOURSELF ▼
6 Finally, while still holding down the mouse button, you can increase or
decrease the distance you’re dragging from the point you clicked This
changes the curve’s arc Before your hand gets tired, move the mouse
to the right Then double-click down to the right at about the same
height as the first point to make an arc Even though this curve has
three points, only the middle one needs a curve—that is, when you
create the first and last points, you don’t click and drag
Create and Style Text
TRY IT YOURSELF ▼
In this task, you explore using text in Flash Follow these steps:
1 In a new file, select the Text tool, click the Stage, and then type a
word; we typed Hello This click-and-type technique expands the
mar-gin for the block of text to the exact width of whatever you type The
circle that appears at the top-right corner of the text block indicates
the margin automatically adjusts in this way (see Figure 2.17)
2 When you click and drag this circle to adjust the width, it turns into a
square to indicate the margins are fixed You can double-click the
square margin control to restore the automatic margin adjustment
(that is, to make it a circle again)
FIGURE 2.17
The circle in the top-right corner indicates the margins adjust to fit what you type Once you’ve set the margins by dragging any han- dle on the text, the circle turns to
a square.
Trang 2TRY IT YOURSELF
▼
Create and Style Text
3 While editing the text block, you can set the margin Make sure the beam cursor is blinking in the block; click inside the block of text, ifnecessary Grab the little circle at the top-right corner of the text block,and widen or narrow the block of text The circle margin handlechanges to a square, which indicates margins are set and any text youpaste or type into this block wraps when it reaches this margin Goahead, and type a couple lines of text You should see the text wrapeven though you didn’t press the Enter key
I-4 Now that you have some text in the block and have set the margins,it’s time to modify some attributes of the text Two ways to modify thetext include: selecting all or some of the characters or adding morewhere you’re editing the contents of the text; or, selecting the entireblock and picking it up, moving it, or modifying the attributes This isnot the same as simply selecting all the characters while editing theblock Click the Selection tool to stop editing the text Your text blockshould be selected If it isn’t, click it once, and a rectangle appearsaround it
5 With the block selected, observe the Properties panel to make cations For now, modify the text’s color, font, and font height, asshown in Figure 2.18 Any setting you make here applies to all charac-ters in the text because you’re editing the entire block Most of theProperties are easy to learn There’s an especially nice feature that al-ways displays a preview of the type face when you select a different
modifi-NOTE
Adjusting Text Margins
By the way, if you had clicked
and dragged with the Text tool
to the right before typing
(in-stead of clicking and then
typ-ing), you would have created a
margin in one step You can
always adjust the margins
later, too There are two ways:
If you’re editing the actual
text, you use the circle or
square in the top-right corner;
or, if you’re not actually editing
the contents of a text block,
you can still select it using the
Selection tool In this case,
you can change the margins
by dragging any of the square
handles in the corners
FIGURE 2.18
The Properties panel enables you
to change text attributes, such
as font size and color.
Trang 3Create and Style Text
TRY IT YOURSELF ▼
font The preview displays the characters you have selected if you’re
editing the contents of the text block For example, if you double-click
and then select some of the characters, those characters appear in
the preview
6 Change the text style of part of your text block to bold or italic by first
selecting the characters you want to change and then selecting bold or
italic Double-clicking the text block automatically selects the Text tool
You can select the characters as you would in any word processor by
clicking and dragging While some text is selected, use the Properties
panel to change the selected text If you want to change the font, the
preview includes the text you have selected You can use this method
to change the properties of individual characters within any block of
text
7 Switch to the Selection tool, and select the block of text Using the
Properties panel, change the alignment to Align Center under the
Para-graph section of the panel, as shown in Figure 2.19 Explore the other
settings, which control attributes such as the margin padding and line
spacing, by clicking the Format button
A few options are shown in Figure 2.19 that we haven’t covered yet
Specifi-cally, the Text type options (Static, Dynamic, or Input) are explored in Hour 16,
FIGURE 2.19
When the block of text is selected, use the Properties panel to change the alignment (to Align Center, in this case).
Trang 4“Basic Interactivity.” For now, you should always leave the Text Type down in the Properties panel set to Static Text When you do this, the textyou type never changes, and your audience sees the same font you’ve cho-sen Dynamic is for text that needs to change while the movie runs, and In-put is for text you want to let the user change The Selectable button givesyour users the ability to select and copy the text
drop-Another important option is the setting for Font rendering This lets you
control how the text aliases, which affects how it will appear—most notably,
when the text is very small Generally, you should select the rendering tion by eye—that is, simply select the option that looks best given yourfont, font size, and other layout conditions For tiny text, like 8 or 10 point,Bitmap text is a good option—although you should always at least previewhow Anti-alias for readability looks The option for Use Device Fonts is ef-fectively no anti-alias (like Bitmap text); however, users have to have thesame font installed on their machine or a substitute is used—so this is arisky option There are two reasons to consider the Anti-alias for animationoption: First, if the text is being moved for an animation, it looks smoother;
op-second, this is the only version of anti-aliasing available when you plan todeliver your site to users with older Flash players, which we discuss book-ing Hours 20, “Linking a Movie to the Web,” and 24, “Publishing a Cre-ation.” Finally, the Custom Anti-alias option lets you fine tune thethickness and sharpness for any look you prefer
Aliasing and Anti-Aliasing
Anti-aliasing is a way of smoothing otherwise rough diagonals and curves
with a blurry fuzz If you zoom in on a diagonal line without anti-aliasing,you see a stair-case effect Adding fuzz can make that diagonal line lookbetter; albeit blurrier Normally, anti-aliased text appears smoother and ismuch more pleasing One problem arises when the anti-aliased text issmall—it can be too blurry to read In earlier versions of Flash, the only vi-able solution for small text was to turn off anti-aliasing completely, which isstill sometimes the best option In addition, anti-aliasing affects how fastanimated text can fly across the screen
Selecting and Transforming ObjectsNow that you’ve seen how to create lines, fills, deco fills, shapes (with bothlines and fills), and text, it’s time to explore how to modify them Theprocess seems simple You select the object you want to modify by using
Trang 5the Selection tool, and then you modify it But, selecting exactly what you
want to modify is often the most challenging part The following section
looks at some of the fundamentals, and you learn even more about this in
Hour 5, “Controlling Color.”
Object Draw Mode Versus Merge Mode
Before we can discuss selecting objects, you need to understand the
differ-ence between the two ways to create objects: Merge mode and Object Draw
mode By default, and any time you don’t have the Object Drawing option
selected at the bottom of the Tools panel, you’re in what’s called Merge
mode In Merge mode, most of the drawing tools create shapes with the
ex-ception of the Rectangle Primitive, Oval Primitive, and Text These fills and
lines are all drawn on the same plane—meaning that if you draw two
shapes on top of each other, the one drawn second wipes away any part of
the first shape that’s underneath the second This behavior can actually be
used to your advantage although it is disorienting to many at first
Object Draw mode makes everything you draw a Drawing Object Unlike
shapes, Drawing Objects can be stacked and don’t eat away at each other
Despite the fact we’ve taught hundreds of students how to draw in Merge
mode in earlier versions of Flash, Object Draw mode is a more intuitive
way to learn
Normally, the Draw mode you have selected affects what you draw When
you’re in Object Draw mode, each time you click to draw a line, fill,
rectan-gle, or oval you create a new Drawing Object Deep inside that Drawing
Object is a shape You can double-click to edit the contents, and you find a
plain old shape inside It’s mildly confusing because Rectangle Primitive
and Oval Primitive objects behave similarly to Drawing Objects as they’re
stackable, but you can’t double-click a primitive to edit its contents You
might need to access the shape inside a Drawing Object to select and
change, move, or delete part of the object You learn much more about
se-lecting shapes later this hour, but sese-lecting a Drawing Object means
select-ing the whole object When you’re done editselect-ing the shape inside a Drawselect-ing
Object, you double-click the object or click the blue arrow button at the left
of the address bar, as shown in Figure 2.20
Because Drawing Objects contain shapes that don’t modify any shapes
un-derneath them, it shouldn’t be a surprise that Flash provides a way to
con-vert a shape(s) into a Drawing Object To concon-vert a shape into a Drawing
Object, select all the shapes you want, and then click Modify, Combine
Trang 6FIGURE 2.20
Use the address bar (officially
called the Edit Bar) to return to your
main stage when you’re finished
ed-iting the contents of a Drawing
ob-ject.
shape, then select the Drawing Object, and click Modify, Break Apart ize those shapes now behave like any shape and can be erased by othershapes on the sole plane where all shapes reside
Real-The whole concept of shape versus Drawing Object only applies to linesand fills Text and primitives behave more like Drawing Objects (though,they’re really neither) because they don’t eat away at other things youdraw Another tidbit to know is you can always toggle between ObjectDraw mode by pressing J This only affects things you’re about to draw, notthings you’ve already drawn (To do that, use the Modify menu as men-tioned previously.)
Object Draw mode is more intuitive at first, but you can also learn to loveMerge mode The following is a quick review in order of importance:
Realize you can only select an entire Drawing Object, not just some orportions of the shapes contained
To get to the shapes inside a Drawing Object, double-click Be carefulnot to get lost while inside—remember to exit the object by clickingthe left arrow in the address bar
The setting in the Tools panel (for Object Draw mode or not) affectsnew things you draw; for example, to convert an existing shape(s) to
a Drawing Object via Modify, Combine Objects, Union, or to turn a
Trang 7Selection Tools
The two basic selection tools are the Selection tool and the Lasso tool The
Subselect tool is the white arrow It is for selecting and editing individual
anchor points in the same way the Pen tool created them If you’re familiar
with controlling shapes by using the Pen tool, this section will be familiar to
you If you’re not familiar with using the Pen tool, you should master the
basics before working with the Subselect tool This section concentrates on
just the Selection tool and the Lasso tool
The Selection tool can seem so simple that it’s not worth discussing, but it’s
actually quite powerful You’ve already used the Selection tool to select an
object by clicking it once The key to the Selection tool is the cursor changes
to tell you what happens when you click You can try this tool on a couple
simple shapes in the following task
Use the Selection Tool to Select and Modify Shapes
TRY IT YOURSELF ▼
In this task, you explore how the Selection tool’s cursor changes to inform
you what happens when you click Follow these steps:
1 Select the Oval tool, but before you draw, select a very thick stroke
height (5 or so) in the Properties panel Turn on Object Drawing via the
button at the bottom of the Tools panel Draw a circle, and then select
the Rectangle tool Turn off Object Drawing, and draw a square
2 Choose the Selection tool Move the cursor to the middle of your
square The cursor changes to include the move symbol, indicating
that if you were to click and drag, you would start moving this fill (see
Figure 2.21)
3 Click and drag Notice that only the fill of the square moves Select
Edit, Undo (or press Ctrl+Z) to restore the fill Also, make sure nothing
is selected by just clicking the white area of the Stage or pressing Esc
4 Position the cursor over the circle you drew If you click and drag you’ll
move the entire circle because it’s a Drawing Object Its fill and stroke
are contained in one object
5 Move the cursor so that it is near the outside edge of the square The
cursor adds a curved tail, as shown in Figure 2.22 Now if you click
and drag, you bend the line Go ahead and click and drag to the left,
and the line portion of the square bends Notice that the fill bends
with the line This cursor behavior is consistent for Drawing Objects or
shapes However, because it’s possible to select the square’s fill and
stroke independently, as it’s a shape, you’ll need to just click and
drag—don’t click and then click and drag because that selects then
moves the stroke portion
FIGURE 2.21
The Selection tool’s cursor changes when it is on top of a fill
to indicate that clicking will start
to move the fill.
FIGURE 2.22
When the cursor is near a line, it changes to indicate that clicking will start to bend the line.
Trang 8TRY IT YOURSELF
▼
Use the Selection
Tool to Select and
Modify Shapes
6 Make sure nothing is selected and move the cursor so that it’s nearanother corner of the square A corner shape is added to the cursor,which means that if you drag, you’ll be moving the corner point (seeFigure 2.23) Try it It’s like you’re bending the line, but instead you’rejust moving the corner
7 You’ve seen the cursor communicate what will happen when you clickand drag Now you can use the Selection tool to simply select some-thing For instance, clicking anywhere on the circle (the line or the fill)selects the entire Drawing Object However, you can select just the lineportion of one side of the square by clicking it
8 With part of the square’s stroke selected, notice that the cursor addsthe “move” symbol when you’re near the selected line Click and dragnow, and you can move the stroke You can also just press Delete toremove that line portion Do so now
9 Deselect everything (by clicking a blank area onstage or pressing Esc)and this time double-click on what’s left of the square’s stroke Whenyou double-click a stroke, you select the entire stroke At this point,you could move or delete the stroke Just leave it for now
10 The circle was easy to select because it is a Drawing Object Becausethe square is just a regular shape, if you click the fill, you select justthe fill If you click the stroke, you select just one side If you double-click the stroke, you select only the stroke portion However, if you dou-ble-click the fill of the square you should find that the entire square isselected Now you can move or delete the square In fact, you couldeven select Modify, Combine Objects, Union to turn the square into aDrawing Object Don’t bother, though
11 Another way to select the square is to marquee it With the Selection
tool still selected, click outside the square and drag until you you’vedrawn an imaginary rectangle that surrounds the square entirely Whenyou let go, the square becomes selected In the case of a Drawing Ob-ject, or primitive, your marquee need only touch the object to select it
12 Sometimes the arrangement of other shapes onscreen makes themarquee technique difficult or impossible Notice in Figure 2.24, youcan’t marquee just the square without selecting part of the circle Infact, there’s a preference (Edit, Preferences, General) called Contact-sensitive Selection and Lasso tools, but that setting doesn’t affect se-lecting shapes To select the square in such a sticky situation asFigure 2.24, you could simply double-click the fill of the square How-ever, there’s another tool you can use to do this: the Lasso tool
FIGURE 2.23
When the Selection tool is near a
corner, it shows yet another
cur-sor, this time indicating that you
can extend the corner.
FIGURE 2.24
Sometimes using the marquee
technique would select more than
what you want.
Trang 9You use the Selection tool to employ the marquee technique If you click and
drag an object, it moves or bends However, when you click the Stage
where there are no objects, you see a rectangle appear while you drag (this
is the marquee) You can draw that rectangle around other objects, and they
will be selected when you let go Using this marquee technique to select
ob-jects is often easier than clicking to select obob-jects
You’ll learn how to modify what you’ve selected in the next section, but at
this point, you have the fundamental selection techniques under your belt
More advanced techniques are discussed in Hour 5, but the best clue as to
what will happen if you click is how the cursor changes You’ll find many
places in Flash where the cursor is communicating information to you For
Use the Selection Tool to Select and Modify Shapes
TRY IT YOURSELF ▼
13 Select the Lasso tool and then click and drag around a shape to
se-lect it The Polygon Mode option for the Lasso tool makes the tool act
almost like the Pen tool, though the Polygon Mode behaves like a
string or rubber band Select the Polygon Mode option, as shown in
Figure 2.25, and click onscreen and let go Then click and release in a
new location to extend the selection Continue to extend the selection
and then double-click when you’re done There’s also a spring-loaded
way to access the Polygon Mode: hold down the Alt key while you
click In this case, double-clicking the fill would probably be easier, but
often when you’re selecting several objects, you need to use this
method
14 Finally, you can decide to select just a portion of a shape Suppose
you want to chop off the top of the square You can use either the
Lasso tool or the marquee technique with the Selection tool to select
the portion desired (see Figure 2.26) If you want to select just part of
the circle you need to first double-click (to enter the Drawing Object)
and then you can select the contained shapes as normal Just
remem-ber to get back to your main stage by clicking the left-arrow in the
ad-dress bar
FIGURE 2.25
The Polygon Mode option for the Lasso tool lets you click for each corner of the selection you want to make.
FIGURE 2.26
Using the Selection tool to marquee just part of a shape chops off the top of the circle in this case.
Trang 10an object that is already onscreen The cool part is that it actually samplesmore than just color, as you’ll see in the following task.
3 With the Dropper tool, click the center of the first circle Not only doesthe fill color change to the sampled fill color, but the Paint Bucket toolalso becomes active You can now fill the second circle with the colorsampled by the Dropper tool
FIGURE 2.27
The Dropper tool changes its
cur-sor to indicate that it will sample
a fill when you click.
TRY IT YOURSELF
▼
Select Attributes
with the Dropper Tool
In this task, you’ll use the Dropper tool to select color and additional tributes Here are the steps to follow:
at-1 Select the Oval tool, set the stroke height to 10, and draw a circle
Change the stroke height, the stroke color, and the fill color Then drawanother circle Finally, change both the stroke and fill color settingsand draw a third circle
2 At this point, if you wanted the second circle to have the same fill color
as the first circle, you would have to change the fill color If you member the color, you’re in luck Even better than relying on your mem-ory, you can select the Dropper tool Notice how the cursor changes toinclude a brush when you’re over the fill of the first circle, as shown inFigure 2.27 This indicates that if you click, you’ll select the fill attrib-utes of this shape
Trang 11TRY IT YOURSELF ▼
4 If you want to match the strokes on both circles, you could use the Ink
Bottle tool, but you would have to set all the attributes manually It’s
far easier to use the Dropper tool to sample all the stroke’s attributes
in the first circle Select the Dropper tool and move it near the stroke
of the first circle Notice that the cursor changes to include a pencil
(see Figure 2.28) This indicates that you’ll be sampling the stroke (or
line portion) of that shape
FIGURE 2.28
The Dropper tool changes its cursor to indicate it samples a stroke when you click.
5 Click to sample the stroke, and you see the stroke attributes update
in the Properties panel Also, the Ink Bottle becomes active, so you
can click the second circle to change its stroke Remember the
Drop-per tool samples all attributes, not just color
Transforming Scale, Rotation, Envelope, and
Distortion
You’ve seen how to bend, extend, and move shapes by using the Selection
tool and how to change shapes that are already onscreen by using the Ink
Bottle and Paint Bucket tools There are still more ways to modify the objects
you select The Free Transform tool is your key to even more modifications
Basically, you select an object with the Free Transform tool active Up to four
options appear any time you use the Free Transform tool and have an object
selected You can also find these options by selecting Modify, Transform In
the following task, you experiment with these options
Trang 12In this task, you explore the four basic options for the Free Transform tool.
Follow these steps:
1 Use the Rectangle tool and with Object Draw mode turned off, draw asquare Select the Free Transform tool It shares a slot in the Toolspanel, so you can click and hold the Gradient Transform tool to see it
You can always select Free Transform by pressing Q With the FreeTransform tool selected, double-click the center of the square to select
it entirely (Interestingly, the Free Transform tool can perform many lection tasks.)
se-2 At this point, none of the four options should be selected (see Figure2.29) This means you’re in Free Transform mode, and if you have asteady hand, it’s possible to rotate, scale, or distort the shape
FIGURE 2.29
When an object is selected, you
can choose the Free Transform
tool’s Scale option.
3 Explore the possibilities by rolling your cursor over the square handles
at the corners and sides of the shape, but don’t click yet Depending
on where you move your mouse, the cursor changes to two versions
of the Scale option, as well as Rotate and Skew (as in Figure 2.30) Ifyou hold down Ctrl, the corners make the cursor change to the Distortoption
4 Free Transform mode can be really touchy, so let’s go through the tions individually The selected object shows square handles in thecorners and on the sides Notice the cursor changes when you roll
Trang 13Transform Drawn Objects
TRY IT YOURSELF ▼
over these handles The corner handles let you scale both width and
height equally and at the same time The side handles let you change
just width or just height Click and drag a corner handle to change the
scale This version of Scale (compared to Scale in Free Transform
mode) maintains your shape’s proportions horizontally and vertically
Now drag a side handle, and you change just the width
5 Make sure the square is still selected, and choose the Rotate and
Skew option Now the corner handles rotate and side handles skew
Roll your cursor over the handles to see the cursor change
6 Click and drag a corner handle and notice you can rotate the square
Actually, if the default Snap to Objects option is selected (that is, if
the magnet button is pressed in, as shown in Figure 2.31), the object
snaps into place at 15-degree increments You learn more about this
in the next section, “Using Snap to Objects to Connect Shapes.”
7 Select the Distort option Drag the shape by the handles on the
cor-ners to distort The Selection tool can create the same effect as
Dis-tort, but only when the shape itself has a corner to grab Without this
Distort option, you would find making a distorted ellipse nearly
impos-sible Finally, try holding down the Shift key and dragging a corner
han-dle when you distort This way, you can distort two sides evenly
8 Finally, the wildest of transformation options is Envelope To best
un-derstand this option, draw a new square, select the Free Transform
tool, and click the Envelope option When your shape is selected, you
see many handles Move the square handles to influence the shape
Rotate (corner) Skew (side)
Scale one dimension (side) Scale both dimensions (corner)
FIGURE 2.30
Depending on which handle you grab and which option is selected, you can use both Scale and Rotate
to modify the shape in multiple ways.
Trang 14Handles are little white squares that let you stretch, rotate, or otherwise
trans-form a selected object When you select an object, it is either highlighted orappears with a box around its edges When you select the Free Transformtool’s Scale or Rotate and Skew options, for example, handles are added tothe selection Different handles often have different functions, but the cursorchange is your best clue as to exactly what happens when you click
Don’t overlook the fact you can select more than one shape or object, andthen transform everything that is selected at the same time Also, you canfind all the tools explored in the preceding task by selecting Modify,Transform.Another way to do all these things is in the Transform panel
The Transform panel lets you rotate or skew any selected shape You canalso remove transformations immediately after making them by clickingthe Reset button in the Transform panel (or by using the keyboard shortcutCtrl+Shift+Z) Finally, an interesting button is the Copy and Transform but-ton in the Transform panel This button duplicates the selected object andapplies the most recent transformation every time you click it The result is
FIGURE 2.31
If Snap to Objects is turned on,
when you rotate an object, it
snaps to logical positions, such
as 45 degrees.
Trang 15Using Snap to Objects to Connect Shapes
One of the most helpful features in Flash is Snap to Objects By selecting
View, Snapping, Snap to Objects(or clicking the Magnet button at the
bot-tom of the Tools panel when the Selection or Free Transform tools are
ac-tive), you can draw perfectly round circles, horizontal or vertical lines, and
much more The visual cue that Snap to Objects is helping you is the dark
ring that often appears next to your cursor while you drag When you see
that ring, you know Flash is trying to help you draw
You might already know from using other software that holding the Shift
key constrains your cursor similarly to Snap to Objects, but Snap to Objects
can do much more In addition to helping you draw perfect shapes, Snap to
Objects also enables you to connect two shapes It’s more than simply
mak-ing two shapes touch—they actually become bonded In Flash, unless two
shapes have been snapped together, they can look connected when they
ac-tually aren’t For example, you draw an arrow in the following task, but
un-less the arrow head is snapped to the arrow’s body, it might not remain
visually connected when you scale it to a larger size After a shape is
snapped to another, it’s forever connected
Use Snap to Objects
to Draw Perfect Shapes and Connect Objects
TRY IT YOURSELF ▼
This task walks you through some of the amazing ways Snap to Objects
helps you draw Follow these steps:
1 Confirm that Snap to Objects is selected in the View, Snapping menu,
and then click the Rectangle tool While you click and drag, if you’re
close to drawing a perfect square, you see the dark ring appear near
your cursor (see Figure 2.32)
2 Select the Line tool and draw a line at a 45-degree angle elsewhere on
the Stage This time you have to hold Shift as you draw the line to
con-strain it to 45 degrees
3 Connect the top of the line to a corner of the square To do so, click the
Selection tool; make sure before you click and drag the end of the line
that the cursor changes to show the corner tail You can then click and
drag to extend the line, and you see it snap to the square Keep
dragging and notice how the line can snap to a corner or a side
Sev-eral different logical locations exist on the square; snap the line to a
corner
4 The last step probably changed the angle of your line, so click Edit,
Undo (or press Ctrl+Z) and try again This time, single-click the line to
select the whole thing, let go, click the end of the line, and drag to
FIGURE 2.32
If Snap to Objects is turned on while you’re dragging with the Rec- tangle tool, a dark ring appears to help you create a perfect square.