That depends what program you are talking about.
Use the scroll bar to the right of the screen. Click on any area outside the vertical scroll bar, and the display will move by one whole screen - either up or down.
The scroll bar at the right of the screen reflects the location of the portion of the document that is displayed on the screen. When using a program like Adobe Reader, a person can hover the mouse over the scroll bar on the right of the screen to locate the page and line of the document.
The scroll bar on the right side of the screen.
to move the page left or right when your computer screen is to small to fit the whole page
horizontal scroll bar
The virtual bar on the bottom and/or side of a window that allows you to move your point of view of anything that's too large to fit in the window frame. There should be one on the right of your browser as you read this.
Horizontal scroll bar
The scroll bar at the right side of the window allows you to move the visible part of the data up and down as desired. Vertical scroll bar
Scroll bars - allow you to scroll throughout a document that is too long to fit on one screen.
Right Click
scroll box
Horizontal Scroll Bar