I’m trying to explore if I can make a pop up text editor when users click in text parameter fields so that we can see all the text in a nice wrapped window.
The 2026 Revit API provides access to these events:
UI Application Events
Application Class Events
Controlled Application Events
No event specific to the property panel per se.
But in itself, this is a Transaction, The Document is Changed, so you could piggy back on the DocumentChanged event for example:
The idling event is another option, but may overload Revit