Index Name | Description |
Main or 0 | the screen with the primary menu bar (as configured in the Displays preferences). |
Second | the first from the left which is not the Main screen. |
Third | the second from the left which is not the Main screen. |
Internal | the internal screen of the Mac. |
External | the first from the left which is not an internal screen. |
Mouse | the screen containing the mouse. |
Front | the screen containing (the most of) the front window. |
Back | the first from the left not containing (the most of) the front window. |
Back2 | the second left most screen not containing (the most of) the front window. |
All | all of the screens, from left to right, one per line. |
Positive Calculation | the indexed screen from left to right. |
Negative Calculation | the indexed screen from right to left. |