Just like Corridor7, to cheat you need to add command line arguments to the exe on the command prompt.

For Wolfenstein 3D and Spear of Destiny, there is a specific conf file for dosbox where it's easy to add the debug argument.

However, for C7 and Op.BC, it looks like you're launching a frontend through dosbox.

So I was wondering if I was supposed to edit something in the menu batch file to add the cheat function.

Maybe add the argument after the exe name on the "call" line under the single player section of the batch file?
Or maybe the BC batch file in the game\C\BCCD folder?

I wish those cheat functions were added out of the box, since you need to toggle them afterwards, there is no reason not to, and Capstone games are usually much more enjoyable if you chat given how raw they are...

If anyone can give me a hand with wrapping my head around the Ziggurat frontend and finding how to enable cheats in BC (and C7 since they use the same frontend), I'd be really grateful.

You wield your name well, thanks.

I'll add that it also works if you add NSR250 after BCCD in the BC.BAT file.
Also for some reason pressing LShift+Alt+[Key] seems to work better.

Also LShift+D does not seem to work, but the "reload" cheats also gives all weapons and ammo.

Yeah I'm wondering this too. Trying to export a map.