Tài iệu Photoshop cs5 by Dayley part 79 ppt

l Exclude Overlapping Path Areas: When this option is selected, the current working path is altered to include only those areas where the original current working path and the newly cre

l Exclude Overlapping Path Areas: When this option is selected, the current working path

is altered to include only those areas where the original current working path and the newly created path do NOT overlap each other Figure 17.13 shows how the exclusion path is created when an open path is intersected by the current circle path using the Exclude Overlapping Path Areas option

FIGURE 17.13

When using the Exclude Overlapping Path Areas option, the working path is altered to include only the area where the older working path and the newly created path do not overlap

Using the Path Selection tools

The Path Selection tools, shown in Figure 17.14, allow you to create, move, and manipulate tools

You use these tools to adjust and customize existing paths You also use these options to combine paths into shapes

FIGURE 17.14

Using the Path Selection tools, you can select, move, and scale one or more paths, as well as edit

individ-ual anchor and direction points on a path

Path Selection tools

The keyboard shortcut A selects the path selection tools, and Shift+A toggles between the Path Selection tool and the Direct Selection tool The following list describes the purpose of each path selection tool:

l Path Selection tool: The Path Selection tool is used to select entire paths or groups of

paths You can use the Path Selection tool to select, move, or scale a single path or several paths Multiple paths are selected by using the Shift key

Tip

If you hold down the Alt/Option key while dragging a path with the Path Selection tool, a duplicate of the path

is created and you drag the duplicate instead of the original path This is a great way to create multiple copies

of the same simple path n

l Direct Selection tool: The Direct Selection tool is used to select one or more individual

anchor points on a path You can use the Direct Selection tool to drag and reposition the anchor points You also can use the Direct Selection tool to adjust the direction points of the selected anchor to change the curve of the line You can select and manipulate multi-ple points on the path by holding down the Shift key as you select the anchor points

Tip

You can change the Path Selection tool into the Direct Selection tool on the fly by holding down the Ctrl/Ô

key This saves you a bit of time if you need to toggle back and forth n

Tip

When a path is selected using the Path Selection tool, you can fine-tune the position by using the arrow keys

on the keyboard When one or more anchor points are selected using the Direct Selection tool, you can

fine-tune the position of the anchor point using the arrow keys on the keyboard n

Using the Path Selection tool options

When the Path Selection tool is selected, several useful options are available in the tool options menu bar, shown in Figure 17.15 The Path Selection tool options allow you to add a bounding box to the path that contains handles that you can use to scale the path vertically and horizontally

The Path Selection tool options also allow you to define how the path areas combine into the working path You also can use the Path Selection tool options to quickly align multiple paths

FIGURE 17.15

Using the Path Selection tool options, you can add a bounding box, define how paths combine, and align

multiple paths

Add Shape

Subtract from Shape Area

Exclude Overlapping Shape Areas Alignmenttools

The following list describes the options available for the Path tool:

l Add to Shape Area: When this option is selected, the currently selected paths are added

to the shape area; any overlapping areas are still in the resulting shape area Figure 17.16 shows that adding all of the selected paths to the shape area will include them in the working path

FIGURE 17.16

When using the Add to Shape Area option, the area inside the selected paths is added to the existing working path

l Subtract from Shape Area: When this option is selected, the currently selected paths are

deleted from the current working path—in other words, any overlap is removed from the working path Figure 17.17 shows how the selected path is removed from the current path created in Figure 7.16 when the Subtract from Shape Area option is selected

l Intersect Shape Areas: When this option is selected, the current working path is altered

FIGURE 17.17

When using the Subtract from Shape Area option, the area inside the selected path is removed from the existing working path

FIGURE 17.18

When using the Intersect Shape Areas option, the working path is altered to include only the area of overlap between the older working path and all the selected paths

l Exclude Overlapping Shape Areas: When this option is selected, the current working

path is altered to exclude those areas where all the selected paths and the original working path overlap This can be a bit tricky until you figure out that all paths including the working path must overlap Figure 17.19 shows how the intersection of two selected and the current working path from Figure 17.16 is excluded using the Exclude Overlapping Shape Areas option Notice that the small circle is excluded in the resulting path, because

it is the only part that actually intersects both paths and the working path

FIGURE 17.19

When using the Exclude Overlapping Shape Areas option, the working path is altered to exclude the area of overlap between the older working path and all the selected paths

l Combine: When you click the Combine button, paths that make up the current working

area are combined to form a single path set Figure 17.20 shows how converting the path from Figure 17.17 results in a single path

FIGURE 17.20

Clicking Combine converts the paths that make up the current working path into a sin-gle path

l Alignment tools: The Alignment tools allow you to align two or more selected paths to

the top, right, vertical center, left, right, and horizontal center These options are useful to arrange paths in exact lines and position them accurately For example, Figure 17.21 shows two items centered vertical with each other using the Alignment tool

FIGURE 17.21

Selecting multiple paths and clicking the Align Vertical Center option aligns the centers

of the two paths with each other

l Distribution tools: The Distribution tools allow you to distribute three or more selected

paths evenly to the top, right, vertical center, left, bottom, and horizontal center These options are useful to evenly arrange paths in exact lines and position them accurately For

FIGURE 17.22

Selecting multiple paths and clicking the Distribute Horizontal Center option aligns the centers of the two paths with each other

l Show Bounding Box: When you select this option, a bounding box is displayed around

the selected paths The bounding box provides handles on each edge, as well as rotation controls at each corner You can use the bounding box to resize and rotate the selected paths If you hold down the Shift key, the size adjustments keep the vertical and horizon-tal proportions, and the rotation is done in 15-degree increments Figure 17.23 shows an example of using the bounding box to resize and rotate the selected paths

FIGURE 17.23

Using the bounding box, you can rescale and rotate the selected paths in the image

Paths panel

The Paths panel, shown in Figure 17.24, allows you to manage the current paths in your docu-ment From the Paths panel, you can select paths, convert paths to selections and vice versa, as well as create new paths

FIGURE 17.24

The Paths panel allows you to create, adjust, and manage the paths in your images

From the Paths panel, you can use the following options:

l Fill path with foreground color/Fill Path: This fills the currently selected path with the

current foreground color The path does not need to be closed, but it does need at least two line segments that do not form a straight line

l Stroke path with brush/Stroke Path: This option allows you to apply a bitmapped

brushstroke to the path The currently selected brush style and size are used to trace the lines in the path on the image Even though the path is visible on the screen, it isn’t visible

in the saved image or in the printed image unless a fill or brushstroke is applied For example, Figure 17.25 shows an example of the effect on the image when a brushstroke is applied to a path

FIGURE 17.25

Applying a brushstroke to a path makes it visible in the actual image The currently selected brush style and size as well as the current foreground color are used

l Load path as a selection/Make Selection: When you select this option, a new selection is

created using the line segments of the currently selected path in the Paths panel Creating selections from a path is extremely useful for two purposes: You may want to use the capabilities of paths to create and manipulate line segments using the anchors, you may want to apply a path to an image, and you want to alter the pixels below the path before applying it to the image

l Make working path from selection/Make Work Path: When this option is used, the

current selection in the image is converted to a path This is a great way to create complex paths from existing images For example, it was easy to select the darker areas of the image

of the moon in Figure 17.26 and create a path from them

FIGURE 17.26

You can use the Make working path from selection option to quickly create complex paths using areas of existing images that are easily selectable

l Create a path/New Path: When you select this option, a new path is added to the Paths

panel and you can begin to add path components to it

l Delete current path: This removes the currently selected path from the document.

l Duplicate Path: This creates a copy of the currently selected path and adds it to the Paths

panel as a new path

l Clipping Path: This creates a clipping path in the image The dialog box allows you to set

the flatness of the clipping path in terms of device pixels Printers use the value specified

in the flatness field to determine the granularity they look at when applying the clipping path The lower the flatness field, the crisper the clipping looks You also can select which path to use for the clipping path

l Panel Options: When you select panel options from the Paths panel menu, a dialog box

is displayed allowing you to set the size of the thumbnail used to view the path in the Paths panel list

You share paths between documents by selecting them in the Paths panel of one document and then dragging

and dropping them into another document window in Photoshop n

Using Paths

In the previous sections, we discussed path components, the vector tools used to create paths, and Paths panel used to manage paths In this section, we put that knowledge to use in some of the common tasks that you can perform when working with tasks The following sections take you through some examples of creating and using paths

Creating a path

The first example we look at is creating a basic path using the following steps:

1 Select the Pen tool.

2 Set the mode to Paths in the Pen tool options menu.

3 Select the Ellipse tool from the Pen tool options menu.

4 Draw two circles by holding down the Shift key, as shown in Figure 17.27.

FIGURE 17.27

Selecting the Ellipse tool from the Pen tool options menu with the mode set to Paths adds circles to the current path

5 Use the Path Selection tool to select both circles, and then click the Exclude

over-lapping shape area option in the Path Selection tool options menu to remove the center of the inner circle from the path area.