I think it also has a "room explorer" where it will show you a grid of all the room pics in the game, and how they're connected.
And also an abandoned attempt at a visual room editor.
I couldn't find a way to activate these using the exe, so the options to invoke them are probably commented out, or hidden behind some shortcut key. (But the code files are still there, so if someone takes the time to figure it out...).
I know I was experimenting with SCI VGA too. I had it able to load the VGA pic resources at one point - I'm not sure if I got any further than that.