Lettering for architecture and technical theater is basically the same. Lettering can be very pretty and stylized or it can be fairly boring. What it must be, all the time, is clear and legible. For tech theater paperwork we always use capitol block letters. This can get boring quickly. So, we add some style. A slight slant does wonders. A nice curve to some letters. I've known people who get jobs because of their lettering. Think about it; the person hiring wants to have others think highly of the paperwork coming out of their design studio. If I'm the designer and my assistant is drafting the lighting plot, I want the lettering to have a professional flare.

Lettering comes in different sizes, or heights. 

Here are some guidelines for proper lettering:

I’ll be scanning in a few examples soon.