An icon group is a group of icons with related functions. Normally only one icon, the last one used, is displayed in the toolbar until you expand the group by clicking the white triangle that indicates an icon group.
To expand an icon group and select one of its functions, follow these steps:
In a toolbar, click the white triangle on the bottom-right corner of an icon. The icon group expands alongside the toolbar to show all of the tools in the group.
Click on the icon you want to use.
The icon you selected becomes the representative icon for the icon group for the current session of CS Imaging.