Abstract: A control device for adjusting multiple parameters associated with an element or item of a user interface in an easy and intuitive manner. A slider control can be used to change the format or appearance of a timescale presented by the user interface. By using a single visual interface control, a slider control, a time-based scaling of a given view can be easily switched between predefined timescale settings for the timescale. The slider control, which comprises a fob and a rail, can control the parameters that dictate the appearance of the timescale, such as time units, date format, and labels. Once selected, the fob can be moved along the rail to a stop associated with parameter values for the timescale. The presentation of the timescale can be varied by moving the fob from one stop to the next stop along the rail, thereby varying the parameters defining the appearance of the timescale.