When I create a part, I use the custom properties to fill in the following:
I use them to fill in the title block of my drawing.
When I need to create a similar part to the original I use the 'save as..' function. This results in copying the custom properties too...
Offcourse the new part needs to get a new 'part no.', 'description' etc.
Is there a way to blank out the property values or to return the values to template settings.