Xrefresh is a simple X program that causes all or part of your screen to
be repainted. This is useful when system messages have messed up your screen.
Xrefresh maps a window on top of the desired area of the screen and
then immediately unmaps it, causing refresh events to be sent to all
applications. By default, a window with no background is used, causing all
applications to repaint ``smoothly.'' However, the various options can be used
to indicate that a solid background (of any color) or the root window
background should be used instead.