well, the same buttons on your keyboard will always correspond to the same keys.. So no matter what game youre playing, button 1 will always act as button one. Depending on the game is obviously how many buttons used. You can take a second to just test each button and see what it does. A game like 1949 will simply have shoot and bomb, where mortal kombat will have hp, lp etc. Give it a quick spin and see what buttons work. Most games were pretty "consistent" in button setups, so usually a shoot button, or bomb button, high and low punches are generally set up properly and would do well in a 6 button set up.. so most games should feel natural after a few minutes of getting used to the buttons. If youre talking about game specific buttons, such as knowing what button is high punch, low punch before you play, your best bet would be a front end of some sort. I particularly use gameex, and it has options that not only can show you the original control panel, but before launching a game, will display a button layout and what each button does. Generally as you use the tab menu to set buttons to your likings youll probably remember most as you play them. Im not 100% on what your asking but i hope that touched upon it in some way.