Oleg:
I was with you until I started to see underlining and italics, neither of which is appropriate here. Underlining is what we did with typewriters in the all but forgotten days before computers when we wanted typesetters to switch to italics.
Personally, I got so tired of contending with typesetters, I began to borrow their keyboards and code cheat sheets so I could set my own. It turned out to be considerably harder than I'd anticipated, but by and bye, I got the hang of it. You haven't lived until you've spent an evening counting picas.