HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

If they exist, let them be. There will always be a use for them. Maybe.

So, to select a guild or market, you just need to press the corresponding keys on the keyboard (without pressing F5). I don't understand why they are needed in the created menu. If they provide information or affect something, or if some computer systems work differently, then it makes sense, but if not, then there's no need to overload it with extra keys.