A method of providing a slider bar control via a slider bar displayed on a graphical user interface of a portable device, comprising the steps of: - providing a slider bar on the graphical user interface, wherein the slider bar defines a data range from which data can be selected by the user, - providing a slider element associated with the slider bar for selecting at least one item of data from the data range by manipulating the slider element through touch by a user input member, and - increasing the data range in response to an orientation change of the portable device when the orientation of the portable device is changed from a first orientation (α 0) to a second orientation (α 1), - wherein the data range comprises an upper data level (R select) and a lower data level (L select) defining the data range between them, wherein at least one of the upper data level and lower data level (R select, L Select) is changed when the orientation of the portable device is changed from the first orientation (α 0) to the second orientation (α 1), wherein an amount of change of the at least one of the upper data level and lower data level (R select, L select) is at least partially proportional to an amount of change in orientation (α) from the first orientation (α 0) to the second orientation (α 1), - wherein a sensitivity of the slider element for selecting the at least one item of data is changed when the orientation of the portable device is changed from the first orientation (α 0) to the second orientation (α 1), and the selection of the at least one item of data is controllable by movement of the slider element at the same time as controlling the sensitivity of the slider element. - providing a slider bar on the graphical user interface, wherein the slider bar defines a data range from which data can be selected by the user, - providing a slider element associated with the slider bar for selecting at least one item of data from the data range by manipulating the slider element through touch by a user input member, and - increasing the data range in response to an orientation change of the portable device when the orientation of the portable device is changed from a first orientation (α 0) to a second orientation (α 1), - wherein the data range comprises an upper data level (R select) and a lower data level (L select) defining the data range between them, wherein at least one of the upper data level and lower data level (R select, L Select) is changed when the orientation of the portable device is changed from the first orientation (α 0) to the second orientation (α 1), wherein an amount of change of the at least one of the upper data level and lower data level (R select, L select) is at least partially proportional to an amount of change in orientation (α) from the first orientation (α 0) to the second orientation (α 1), - wherein a sensitivity of the slider element for selecting the at least one item of data is changed when the orientation of the portable device is changed from the first orientation (α 0) to the second orientation (α 1), and the selection of the at least one item of data is controllable by movement of the slider element at the same time as controlling the sensitivity of the slider element.