Selecting pixels 61
To create or replace a pixel selection on a selected bitmap using the opacity of
an object:
1. In the Layers panel, position the pointer over the thumbnail of the object you want to use
to create the pixel selection.
2. Hold down Control (Windows) or Command (Macintosh).
The pointer changes to indicate you are about to select the alpha channel, or the opaque
area, of the object.
3. Click the thumbnail.
A new pixel selection is created on the selected bitmap.
To add to the current pixel selection:
■ Control-Shift-click (Windows) or Command-Shift-click (Macintosh) the thumbnail of an
object in the Layers panel to add the shape of its opaque area to the current pixel selection.
To subtract from the current pixel selection:
■ Control-Alt-click (Windows) or Command-Option-click (Macintosh) the thumbnail of
an object in the Layers panel to subtract the shape of its opaque area from the current
pixel selection.
To create a pixel selection on a selected bitmap from the intersection of
overlapping objects:
1. Control-click (Windows) or Command-click (Macintosh) an object’s thumbnail to select
its alpha channel, or opaque area.
2. Control-Shift-Alt-click (Windows) or Command-Shift-Option-click (Macintosh)
another object.
A pixel selection is created on the selected bitmap from the intersection of the opaque
areas of the two overlapping objects.
TIP
When you position the pointer over the thumbnail and hold down the specified
modifier keys, the pointer indicates that you are about to add to the pixel selection.
TIP
When you position the pointer over the thumbnail and hold down the specified
modifier keys, the pointer indicates that you are about to subtract from the pixel
selection.
TIP
When you position the pointer over the thumbnail and hold down the specified
modifier keys, the pointer indicates that you are about to create a pixel selection from
the intersection of the opaque areas of two overlapping objects.
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