I’m starting to think that “mask” may not be the correct term for what I am looking for. Perhaps it should be called “channel markers”. What I would like to see is a semitransparent vertical bar, similar to the one shown in the attached file, centered on each “channel” that I specify in a file similar to the limit-line and path-loss file format. For each channels I specify, a vertical bar is plotted whose width is determined by the settings in the imported file. A small gap (or line) between the channels will help show their boundaries. Perhaps an optional label could be included that is plotted at the top of the channel marker.
For example:
906 (channel center), 2 (channel width), “CH 1” (label) <cr><lf>
908, 2, “CH 2” <cr><lf>
910, 2, “Ch 3” <cr><lf>
etc.
