The best solution I've found to quickly set the properties of a file is to go through the properties form editor!!
By clicking on the little house on the menu on the right side of your screen, you should have a direct link to this module available even with the Standard version of Solidworks. It allows you to define a property form that you can manage as you wish, lots of tools are at your disposal, drop-down lists, checkboxes and many others. In these drop-down lists, you can predefine values as you wish.
The best part is that you can pull out your form for any file and you can link the values to the annotations of your drawings or to the properties of your file!!
It's quite easy to use and very intuitive!
Here is a screenshot of an example of a form in the creation phase!
Yes, as @gt22 says, it's related to the name of your properties, it's a bit complicated at first, you have to feel your way around paying close attention to the names you give to your properties but once you get the hang of it, it's really easy and practical!
@GT22, I was talking about the 2 icons I circled on the attached screenshot.
These icons determine whether the property created via the form will appear in the "customize" tab or in the "configuration-specific" tab.
Knowing that a property with the same name can appear simultaneously in these 2 tabs but that the "specific to the configuration" tab takes precedence over the other.