kinda hard to think how to correctly answere...
well, most of the time (at home)i use it to sequencing (Roland VA76), sometimes I even take styles, thanks to Rolan's Cool thing where you can mix 2 styles together, and record, than and stuff and delete stuff...
when I play live there are tons of stuff to tell, and i dont have time to type it all, cuz i'll be typing one thing than forget what i wanted to say next. okay, If its a song that was planned (not decided on the fly) than there whould be a style playing with some instruments in the style changed when needed, Upper 1 and 2 with assigned tones, sometimes manual bass, sometimes lower parts, sometimes i assign so funky set-up i dont know how to say it, i even had manual drum ready, cuz i had to do some fill-ins(Yamaha is great that they made Pads, but they are not pads, just buttons). most of the time i setup is set-up 10 minutes before a performance because people wanna sing a song and i have to find a syle just in time... also Roland G-1000's Drum variations is what i often find very helpfull. So usualy during performance i switch between upper 1 and 2, turn off a track(like drum track).
But most of the time i use my keyboard for sequencing, and also my uncle just bought a korg trinity, even though trinity is like 10 years old the sounds are better if you take all Roland's arrangers yamaha's psr's... and the sequencer is Much better, you dont have to wait for "Working..." to finish, after you recorded a track... thats a little off the subject...