Sets the mouse speed that will be used if unspecified in Click and MouseMove/Click/Drag.
SetDefaultMouseSpeed Speed
The speed to move the mouse in the range 0 (fastest) to 100 (slowest).
Note: A speed of 0 will move the mouse instantly.
SetDefaultMouseSpeed is ignored for SendInput/Play modes; they move the mouse instantaneously (however, SetMouseDelay has a mode that applies to SendPlay). To visually move the mouse more slowly -- such as a script that performs a demonstration for an audience -- use SendEvent "{Click 100, 200}" or SendMode "Event" (optionally in conjuction with BlockInput).
If this function is not used, the default mouse speed is 2. The built-in variable A_DefaultMouseSpeed contains the current setting.
The functions MouseClick, MouseMove, and MouseClickDrag all have a parameter to override the default mouse speed.
Whenever Speed is greater than zero, SetMouseDelay also influences the speed by producing a delay after each incremental move the mouse makes toward its destination.
Every newly launched thread (such as a hotkey, custom menu item, or timed subroutine) starts off fresh with the default setting for this function. That default may be changed by using this function in the auto-execute section (top part of the script).
SetMouseDelay, SendMode, Click, MouseClick, MouseMove, MouseClickDrag, SetWinDelay, SetControlDelay, SetKeyDelay, SetKeyDelay
SetDefaultMouseSpeed 0 ; Move the mouse instantly.