xrefresh [-option ...]
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.
The xrefresh program uses the routine XGetDefault(3) to read defaults, so its resource names are all capitalized.
It should have just one default type for the background.
Jim Gettys, Digital Equipment Corp., MIT Project Athena