Bill,
I try to only let the list of changes get so long before releasing an update. If I work on it a lot, this doesn't take very long
so you can probably guess what I do in my spare time.
I think I can add the start from cursor to the toolbar with no problem. The start from cursor should clear whatever is on the screen, and you should be to do this at anytime while stepping.
Loading DXF geometry is kinda iffy, but I'll have a look at it.
Thanks,
Scott