WAVE queries the X server to determine how many colors it can display, and what methods it can use to do so. If the X server does not answer this query correctly, WAVE may attempt to use a suboptimal or unavailable display mode. If you find that the colors of other windows change when the cursor moves into a WAVE window, you may prefer to use the `-S' option to avoid this behavior at a slight (often unnoticeable) cost in speed.