15.5.691 xcopy

xcopy, window1, window2 [, x1, y1, width, height, x2, y2]

[x11] Copies the part of the contents of window1 starting at position x1,y1 (default: 0,0) and with width and height, to window2 at position x2,y2. Positive window numbers denote windows, negatives pixmaps.

See also: xtv, xsetaction