Tips for using alpha channels (Photoshop)
- Each image can contain up to 56 channels, including all color and alpha channels.
- You can specify a name, color, mask option, and opacity for each channel. (The opacity affects the preview of the channel, not the image.)
- All new channels have the same dimensions and number of pixels as the original image.
- You can edit the mask in an alpha channel using painting tools, editing tools, and filters.
- You can convert alpha channels to spot color channels.
An alpha channel has these properties:
Original mask (left), and after a filter was applied (right)