Word Perfect for DOS has a ton of features that folks normally wouldn't know about like redlining and all kinds of fancy image rendering things (sorry it was > 25 years ago and I can't recollect specifics), law firms had an entire version-control system integrated with it.
Word Perfect was also how I ended up being an actual programmer for money in NYC. I started automating my work at some of these firms with macros and later with some C and Perl code and some of the gigs I had I could just walk in and spend all day on IRC while I'd get paid $20 an hour (which was a lot) for my scripts to run through all the docs they thought I was re-formatting by hand.