X Version 11
xrefresh - refresh all or part of an X screen
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.
|-white||Use a white background. The screen just appears to flash quickly, and then repaint.|
|-black||Use a black background (in effect, turning off all of the electron guns to the tube). This can be somewhat disorienting as everything goes black for a moment.|
|-solid color||Use a solid background of the specified color. Try green.|
|-root||Use the root window background.|
|-none||This is the default. All of the windows simply repaint.|
|Specifies the portion of the screen to be repainted; see X(7).|
|This argument allows you to specify the server and screen to refresh; see X(7).|
|-version||This argument prints the program version and exits.|
The xrefresh program uses the routine XGetDefault(3) to read defaults, so its resource names are all capitalized.
|Black, White, Solid, None, Root|
|Determines what sort of window background to use.|
|Geometry||Determines the area to refresh. Not very useful.|
|DISPLAY - To get default host and display number.|
It should have just one default type for the background.
Jim Gettys, Digital Equipment Corp., MIT Project Athena