Hello everyone
I have an assembly containing several dozen parts.
Each part has a custom property called "REP".
Currently to modify the REP property of a part, I open the part from the assembly, I go to the custom properties, I change the value, I save, I close the part, and I start again for the next part. And so on for each part of the assembly. Its soooo long and boring...

Ideally I'd like some sort