The invention relates to a method for enabling scrolling on a display in a first direction by turning a scroll wheel of a computer mouse without the need to lift a finger from the scroll wheel during scrolling. This is obtained by switching the mode of operation of the scroll wheel from a first mode of operation, mode 1, to a second mode of operation, mode 2, by performing an action, such as holding down a specific key. The program procedure for mode 2 is such that when the scroll wheel is first turned upon switching to mode 2, a first direction of turning is de-fined. Continued turning of the scroll wheel in either the first direction of turning or another direction of turning will cause a scrolling on the display in the first direction.