1. For resetting in practice, you can go into game options and enable pause delay. This will let you reset training by double tapping options but the downside is you have to HOLD pause in order to get it to pause if you want to change an option or check your move list or something.
2. For KOTH, you can go full screen in any match BEFORE (or after) your own by...long pressing options(?) might be double tap options. Can't remember now, sorry lol I let my girlfriend use the pad so I could use my Real Arcade Pro V5. But thanks to the pause delay, she CAN go full screen in KOTH, she just has to make sure it happens before she gets to the character select screen