It's my first attempt to customize the application menu in Cinnamon (out-of-the-box, standard Linux Mint desktop environment). I want to associate a file extension to a menu item (i.e. set a preference).
I would like to set a preference to open PostScript (*.ps) files with Ghostview (the X10 front-end / GUI for Ghostwriter). I found a suggestion on Superuser, which I tried to follow, as such:
From the desktop, I can navigate menu-> configure -> choose the tab, "Menu" -> then, "Open the Menu Editor",
but, having arrived at this location, regardless of whether I choose New Menu or New Item, I cannot get either of these dialog boxes to accept my entries (i.e., I can only choose Cancel, never OK).
As I cannot get beyond this point, I cannot determine if I am even in the correct place to associate a file type (*.ps in this case) with a given application.