Mouse

CDE uses all three mouse buttons (where available) to provide full point-and-click, drag-and-drop, and duplication services, as explained earlier.

In CDE, you use Control+mouse button 1 to select multiple elements in a window; in OpenWindows, you use mouse button 2. For example, use this keyboard-and-mouse combination when selecting multiple files in a File Manager window, or when selecting several messages from the Mailer message header list.