mc²56 - Central User Button, GUI-Page Select

This function maps a central user button to GUI page switching.

Note that the page switching can apply to the console's Central GUI (GUI 0), or an external display (GUI 1 or GUI 2) if available.

1. Define the Userbutton Index, Scribble and Color in the usual manner.
2. Use the GUI Page drop-down menu to select the main page selection - e.g. Snapshots.
3. Use the GUI Number to define the target display:
   1. GUI 0 (int) = the console's Central GUI.
   2. GUI 1 (ext 1) = an external GUI (if available on your system).
   3. GUI 2 (ext 2) = a second external GUI (if available on your system).
4. Use the GUI Subpage drop-down menu to select the sub page index - 0 = subpage 1; 1 = sub page 2; and so on.