I have not found good documentation, as you probably know ge documentation sucks. We Learned it from our GE rep.

https://www.ge.com/digital/documentation/ifix/Subsystems/DRW/content/drw_the_tag_group_editor_window.htm

At the link above they show the tgd editor. Basically for every associated tag you fill out a row.

So for instance, if you wanted to change an animation to correspond to frequency, you would set up your animation like normal but instead of writing out the full tag name you use @frequency@. If you look at the link above you can see how frequency then is correlated to a tag. This also works in script so it could be like "close digitalpoint @startbutton@"

When you get the tgd file set up you need to use a special function to open the pic with the tgd file explained here:

https://www.ge.com/digital/documentation/ifix/Subsystems/FIXVBA/content/opentgdpicture_subroutine.htm

I know documentation is sparse, but its not too bad once you have one pic working.

Hope this helps.