Mame - Hotkey to change from 4:3 to 16:9 (or full screen)?

[delt31]

For older games like pac man and donkey kong, I need the original screen size format while other games, I actual like a little larger even if it's not 1:1 pixel.  My question is how do I change this on the fly WITHOUT going into the ini file to change it?  I use hyperspin so I hate having to go into the ini file, change then load.  Am I missing something (hotkey or shortcut to change this on the fly while IN game)?

[WakiMiko]

I dunno if it's possible to change the aspect ratio while the game is running. However, you could create a ini file for each game that you want to stretch (or not stretch, depending on your default setting).

E.g. for donkey kong, create a file <yourmamedirectory>/ini/dkong.ini with the text "keepaspect 1".

(this assumes that your default setting is to stretch games)

[delt31]

I dunno if it's possible to change the aspect ratio while the game is running. However, you could create a ini file for each game that you want to stretch (or not stretch, depending on your default setting).

E.g. for donkey kong, create a file <yourmamedirectory>/ini/dkong.ini with the text "keepaspect 1".

(this assumes that your default setting is to stretch games)

This will work well thanks!  I love these forums!  You guys are SO helpful