On a computer screen, a scroll bar is a long thin box along one edge of a window, which you click on with the mouseto move the text up, down, or across the window.
[computing]
scroll bar in British English
(skrəʊl bɑː)
noun
computing
on a computer screen, a long thin box along one edge of a window, which you click on with the mouse to move the text up, down, or across the window
Move around with horizontal and vertical scroll bars.