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Step increment to use for the custom acceleration profile.

Starting from 0, for each entry in custom-accel-profile-speeds, the speed in software will be set for that step in physical device units. A lower step means higher accuracy in the curve. [1.0]

Speeds to use for each step of the system.

The first element in this array will be the speed for the cursor up to the next element, which will match with the next step increment. Libinput uses linear interpolation between points, and after the final point on the curve. For higher accuracy, use a lower step, with more speeds for each step.