NBA 2K12 PSP MY PLAYER QUESTION??

[chimanuel]

Guys this is my 1st time to play nba 2k in psp..i change the setting in coaching i change auto sub to manual sub.then i play my player.when i playing i want to make subtitute my player bcoz there are tired but there nothing in the option to subtitute players my question is how can i change again the coaching setting to auto sub??sorry for my grammar tnxs for the help guys