Preserving channels in exported images
Canvas image channels are compatible with the alpha channels used
in other image-editing programs, including Adobe Photoshop. How-
ever, you must use the correct procedure to preserve alpha channels
when you export an image into Photoshop format.
If you want to export an image into Photoshop format and preserve
the images alpha channels, be sure to use the Export command in the
Image menu, rather than the Save As command.
If you use the Save As command and choose Photoshop format, the
resulting file will not contain the alpha channels associated with the
image.
To export an image with alpha channels
1
Select the paint object in the Canvas document.
2
Choose Image > Export > Photoshop. A directory dialog box
appears.
3
Specify a location to save the file, type a file name, and click
Save to export the selected image as a Photoshop file.
Understanding image channels
Canvas uses up to 24 channels to store the digital information that
makes up the image in a paint object.
There are three types of channels: color or image channels, alpha
channels, and channel masks. All images have at least one channel.
An image can also contain one or more alpha channels and a single
channel mask, if you create them.
The Channels palette displays the channels of an image. Whenever
an image is in edit mode, you can use the Channels palette to select
Add to Selection
Preserves the current selection and selects
additional pixels based on the channel
Subtract from Selection
Removes pixels from the current selection
based on the channel
Intersect with Selection
Creates a new selection composed of pix-
els that appear in both the current selec-
tion and the channel you are loading
Option
Result