A slider is a small, movable piece typically seen on a website or app that allows you to adjust or select a value within a range, like a volume control or choosing a date. Full definition
Also on the left is an alert slider with three positions, which can be used to quickly switch between receiving all notifications, just priority notifications, or none at all. (techspot.com)
There's a touch - sensitive volume slider on the top of the speaker (the right - hand side when vertically oriented), along with touch - sensitive play / pause. (techhive.com)
On the visual side of things Lost Legacy does offer a brightness slider for those who need it. (dagersystem.com)