I would like to know if it is possible once a part file has been created, to modify the "Custom Properties" of this file by making it take into account another "Custom Properties" file.
Because when you use the window that allows you to enter the "Custom Properties" button and the bottom right button "Template Options" that allows you to select another file, the new "Custom Properties" file is not taken into account, and you then have to make the changes line by line with the keyboard.
There doesn't seem to be a problem for that in my house. The "Template Options" button does offer me to choose a different template and applies it correctly after selection.
Could you illustrate your words, by specifying your version of Solidworks?
I wasn't precise enough in my question, indeed the "Template Options" button allows me to choose a different template, but unfortunately this choice does not update "Configuration Specific Properties" and when the ground is missing for example, you have to type the extra line in the Configuration Specific Properties with the keyboard.