Channel palette pop-up menu The following commands appear in the Channel palette’s pop-up menu. Palette Options Lets you select the channel preview size. New Channel Creates a new alpha channel and lets you select channel options. Duplicate Channel Creates a new alpha channel from a single active color or alpha channel. This command isn’t available if a com- posite channel or more than one channel is active. Delete Channel Deletes the active alpha channel. You can’t delete color channels or a composite channel. Channel Options Lets you specify options for the active channel. You can change the name, mask tint color, and opacity of an alpha channel. You also can double-click a channel to set options for it. Working with alpha channels To add to the current selection, Shift-drag a channel to the button. To subtract from the current selection, Command-drag (Mac) or Ctrl- drag (Windows) a channel to the button. To select the intersection of a channel and the current selection, press Command+Shift (Mac) or Ctrl+Shift (Windows) and drag a channel to the button. Alpha channel; white indicates selected area Alpha channel loaded as selection (in color) Applied blend affects selected area only Original image
Canvas 8 Help: Selections and channels (22 of 32)                                                   Page #672