High Quality Content by WIKIPEDIA articles! A pager is a graphical user interface feature provided by some desktop environments, mostly on the Unix and Linux platforms. It takes the form of an onscreen window or a gadget in the taskbar or panel displaying the user`s virtual desktop and providing a way to switch among desktop areas or navigate the workspace. Most pagers depict thumbnail outlines of windows assigned to each desktop and can switch or move windows from mouse gestures or scroll wheel.