Similar to Displayr's other controls, a numeric slider would allow a viewer to select a number along the slider, which could then be used as an input for other things. The slider would have customizable endpoints and scale intervals. So you could set up a slider from 0 to 100 where every "notch" on the slider is 1 or every "notch is 20. You would also have the option of setting the slider to accept any value within the range, whole number or decimal.