I’ve found a few references to this issue but they seem to have been due to a bug in v 1.4.x? I’m currently using 1.7.4.
Basically any method to add a file property simply doesn’t work. The option under ... is greyed out, ctrl+; doesn’t do anything and if i type --- at the top of a page it simply disappears.
I also have this issue. That setting is set to “Hidden”. The “Add file property” option in the context menu is grayed out unless that setting is set to visible. It’s grayed out in both hidden and source options. Is this a bug that should be put in the bug reports? I have properties view enabled and can add properties to the file using that, so why isn’t the context menu using that? Why have an entirely useless button for 2/3 modes?