Can I change color index values or color maps in mid-frame?
The main consideration in doing this is changing the background color. If the background color is changed in mid-picture (color index 0), then in most cases at the time you change the background color your entire frame will be overwritten with that color. As long as you do not change the background color in mid-picture, your results should be as desired. See the simple example below. Trying to swap in an entire new color map is problematic, again primarily due to considerations with resetting the background color. If you are producing PS or PDF output and if your background color is the default, then things should work. Things should work in all cases in going to NCGM and translating with ctrans. Producing X11 output works unless you specifically reset the background color. But, to be on the safe side, what will work in all cases is starting off with any color map and then redefining any color indices except the background. For example, if you have a color table with 256 defined colors
