Specifies the number of mouse buttons SAS is displayed in the KEYS window.
| Valid in: | configuration file, SAS invocation |
| Category: | Input Control: Data Processing |
| PROC OPTIONS GROUP= | INPUTCONTROL |
| Default: | 3 buttons |
| Windows specifics: | all |
specifies the number of mouse buttons, ranging from 0 to 3. If number-of-buttons is 0 or 1, the KEYS windows lists no mouse buttons (because the left, and in this case the only, mouse button is reserved by SAS). If number-of-buttons is 2, the KEYS window lists the right mouse button (RMB), as well as Ctrl + right mouse button and Shift + right mouse button. If number-of-buttons is 3, the KEYS window lists both the right mouse button and the middle mouse button.