How do I use Emacs with a two-button mouse?
Emacs assumes that you have a three-button mouse by default. However, if you have a two-button mouse, you can press both buttons at once to emulate the missing middle button expected by Emacs. Three variables control mouse button emulation under Emacs: w32-num-mouse-buttons, w32-mouse-button-tolerance, and w32-swap-mouse-buttons (win32-num-mouse-buttons, win32-mouse-button-tolerance. If you use help on w32-num-mouse-buttons (i.e., with “C-h v”), it will tell you how many buttons Emacs thinks your mouse has; if w32-num-mouse-buttons is less than 3, then Emacs will emulate the middle mouse button. Emacs emulates the middle mouse button by treating simultaneous button presses of the left and right buttons as a middle button press. Since both button presses cannot really be simultaneous, Emacs compares button presses within a specified window of time to determine whether it should emulate the middle button. This window of time is controlled using w32-mouse-button-tolerance. Help on this va
