Adobe PHOTOSHOP 5.0 User Manual page 285

In the Layers palette, a layer mask appears as an
additional thumbnail to the right of the layer
thumbnail. This thumbnail represents the
grayscale (alpha) channel created by Adobe
Photoshop when you add the layer mask. (See
Chapter 10, Using Channels and Masks.)
A B C D
A. Layer mask selected B. Mask link icon
C. Layer mask D. New Layer Mask
To add a mask that shows or hides the entire layer:
1 If needed, choose Select > Deselect to clear any
selection borders in the image.
2 In the Layers palette, select the layer to which
you want to add a mask.
3 Do one of the following:
To create a mask that reveals the entire layer,
•
click the New Layer Mask (
bottom of the Layers palette, or choose Layer >
Add Layer Mask > Reveal All.
To create a mask that hides the entire layer,
•
Alt click (Windows) or Option-click (Mac OS)
the New Layer Mask button, or choose Layer >
Add Layer Mask > Hide All.
To add a mask that shows or hides a selection:
1
you want to add a mask.
2
3
•
and hides the remaining portion of the layer, click
the New Layer Mask button (
> Add Layer Mask > Reveal Selection.
•
reveals the remaining portion of the layer, Alt-click
(Windows) or Option-click (Mac OS) the New
Layer Mask button, or choose Layer > Add Layer
Mask > Hide Selection.
Selection
) button at the
Layer mask revealing selection
In the Layers palette, select the layer to which
Select the desired area in the image.
Do one of the following:
To create a mask that reveals the selected area
To create a mask that hides the selected area and
ADOBE PHOTOSHOP 5.0 277
User Guide
), or choose Layer