Just try to drag the slider endpoints and the bar in the middle. You can also use the bumper and the arrows on the left and right to manipulate the range. It's also possible to tab through the slider parts and move the handlers or bar with left/right/up/down-button.
Horizontal slider
Horizontal Slider Min Value:
Horizontal Slider Max Value:
A customized horizontal slider
Vertical slider
0
100
Vertical Slider Max Value:
Vertical Slider Min Value: