Control
Use the Control tab to change settings for joysticks, game controllers, and touch screens. This tab is not always available.
From the Launcher, select Global Options, and then select the Control tab.

The Control tab in the Global Options menu
All settings can also be changed in the Configuration file. The configuration key is listed in italics after each setting description.
- Pointer Speed
Sets the speed for the mouse pointer, when it is controlled by the keyboard or a joystick.
kbdmouse_speed
- Joy deadzone
Sets the deadzone for an analog joystick. A lower value will reduce the size of the deadzone.
joystick_deadzone
- Touchpad mouse mode
Toggles between direct mode and touchpad mode.