1.6.1 Mouse and hotkey support in interactive terminals

Interaction with the current plot via mouse and hotkeys is supported for the X11, OS/2 Presentation Manager, ggi, Windows, and wxWidgets terminals. See `mouse input` for more information on mousing. See help for bind for information on hotkeys. Also see the documentation for individual mousing terminals `ggi`, `pm`, `windows`, `wxt` and `x11`.

Sample script: mousevariables.dem