1. Digital Imaging
Unit 8: Enhancing Specific Selections & Adjusting Colors
Module 2: Creating and Saving Alpha Channels
Alpha Channels
Alpha channels are the areas of an
image where masks are stored.
(You may recall a mask is an area
of the image that is protected
from editing).

2. Digital Imaging
Unit 8: Enhancing Specific Selections & Adjusting Colors
Module 2: Creating and Saving Alpha Channels
Alpha Channels
To create an alpha channel:
Click the New Channel button at
the bottom of the Channels panel.
Using the paintbrush tool, paint
on the new channel to mask out
image areas.

3. Digital Imaging
Unit 8: Enhancing Specific Selections & Adjusting Colors
Module 2: Creating and Saving Alpha Channels
Alpha Channels
To edit an alpha channel:
Use the paintbrush tool to add or
delete areas on the mask.
Painting with black increases the
masked area.
Painting with white increases the
selected area.