The_Jiggler

I've been trying to figure out how to change the controls on MAME64. It doesnt let me. I have already tried pressing "tab" after loading "time killers" (awesome game) but it only shows the controlls but doesnt change anything. I'm asking because during gameplay my laptop goes apes**t and switches the screen orientation due to pressing "ctrl+alt+arrow keys". any ideas? also is it possible to use a USB joypad with mame? im new to mame but plenty experienced with other emulators. any help is greatly appreciated. hahahaha! nevermind. 8 seconds after i posted this i figured it out. got use the mouse to double click on the value you want to change. odd for an emulator, never seen one utilize the mouse before.