Quadstick User Manual page 54

The joystick_D_Pad_inner and _outer settings are relative to the scaled signal calculated as a result of the earlier
deflection settings.
Mouse_speed controls how fast the mouse moves based on the scaled position from the joystick calculations.
When adjusting the joystick deflections and mouse speed, first adjust the joystick in a game controller mode, then
adjust the mouse speed second.
The mouse_response_curve setting can make the mouse less sensitive near the center position and move much
faster when the joystick is moved farther away from the center.
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