An apparatus comprises, a user interface surface, sensor circuitry, and logic circuitry. The sensor circuitry to detect a palm-based touch event caused by a user's hand relative to the user interface surface to indicate a degree of coarseness for a graphics change, and detect a digit-based touch event caused by a digit of the user's hand relative to the user interface surface. The logic circuitry to, in response to the touch events indicating the palm is in a fixed position and a position of the digit, provide data associated with the graphics change.