A Slider is a control that is used to adjust a continuous scalar within a predefined interval and is shown below.
Adjust the associated scalar (a number) by selecting a point within the slider area. The scalar value will alter to a value proportional to the distance from the starting boundary of the slider.
The slider current value is indicated by the knob (the blue circle) on the slider. The active region of the slider is the entire slider because if any region of the slider is selected then the knob will jump to that selected location. Hence, the knob does not need to be selected to alter the scalar value.
Sliders appear on many of the inspector editors, for example the Graphics editor has several sliders. Sliders on Tables scroll the table. Sliders often work in conjunction with text fields and the Number Selector which all are different ways of defining a scalar value.