I have been playing with your program for the last week, and have been enjoying it immensely. (And thank you for helping me with the download.)
I like specialty threads, and occasionally combining colors, but I haven't found a way to designate those. (I have thought of printing the chart using an alternative color and then changing what the key says, but that seems sloppy to me.) Is there a way for the user to specify unique threads like that, and if there isn't, would you consider adding one?