Abstract: A graphical user interface and a range slider are provided. Each of a first and second slider thumb is positioned at a respective location along a slider track, and associated with a corresponding value along the slider track. User interaction is detected and identified to include at least one of a tap or a drag. A hardware processor responds to the user interaction by processing a value representing the tap or the drag to determine a location along the slider track of the user interaction. The processor identifies the interaction as being with one of the first and second slider thumbs, and repositions the identified one slider thumb to the determined location along the slider track. In addition, a graphical selection overlay is on the selected slider thumb, and by determining a slider track value associated with the repositioned location of the selected one slider thumb along the slider track.