I have just started climbing in general at the local gym here in Okinawa since I've been stationed here. My main preference is bouldering but routes are pretty fun.

My question is, I do not know the "rules" if their are any on certain grades.

What I mean by rules are, lets say I have a certain bouldering problem in my gym, I know of course I have to use the marked holds for my hands, but am I allowed to put my feet on any hold on the wall? Or am I restricted to only placing my feet on holds that are marked for my hands?

I am all about challenging myself, but being over here in Okinawa and learning, its kind of hard to ask people in the gym for advice with the language barrier.

In short, routes / bouldering, if its a certain route, lets say a blue square, am I allowed to place my feet anywhere, even if it does not have a blue square?