Paul Bennett, kd7kdo, gave a presentation, via Zoom, at the May MARCA Membership Meeting on Sim Smith, a very interesting Interactive Simth Chart program.
The presentation can be viewed here ....
There was also a live demonstration of the program which is overviewed on a few slides in the presentation.
You'll probably want to download it, try it, and then sit back and be amazed that its really Free to use.
Enjoy and Thanks Paul for a smooth Zoom presentation.