Custom Property Editor Developer Toolkit and Pilot Now Available

Update 9/20: This post is now pretty obsolete. Find updated information here and official documentation here.

UPDATE: Syntax has changed in the Beta version available in Summer ’20. To see the changes, click here.

An early version of the documentation and tools for crafting Custom Property Editors for invocable actions is now available here.

The materials include a 35 minute walkthrough that shows how to take the current Send Rich Email Property Editor:

and turn it into this:

Learn more from the Beta Documentation