Post #1017: 
gasperalemao:
Where can I get more info about the Properties section? I’ve searched in the Documentation page, but there is not much stuff. Right now I mostly use Command Stuff.
This page has some info about properties.
These videos (link1, link2) can be useful too.
Here is an example of Modal Rotate Operator (modal_rotate.zip (585 Bytes)). Extract the file and import it in PME.