1. Not built-in to the Lisa Office System, no. (I see that implies there is a way, but there are none that I know of. A utility could be written of course, or discovered somewhere...)
There actually is such a utility: it's one of the demo programs distributed with the
ToolKit. You need to compile it and install it into the Office System yourself. When you run it there, you have to tell it the exact name of the file you want to see (which you should have memorised or written down), and it will display the file in a window (so it probably ought to be a text file!). It's not very useful.
Some trivia for the original poster: there's no way to see Workshop files from the Office System, but you can reveal Office System files in the "File Manager" in the Workshop by NOT listing all files matching
-XXXXX-= (where XXXXX is the name of the volume where you have the Office System installed) but instead by
-XXXXX-{=. Files starting with { are hidden in the File Manager, and all Office System files have "real" filenames on the disk that look like {T12345}.
It may also work to list files matching
-XXXXX-≠ (you type ≠ as Option-=), but I'm not sure: ≠ either means "show hidden files" or "list directories recursively".