What's a palm pedal?

[Percival Blues Shredder]

I was at http://www.bigsbyguitars.com and it said that other bigsby products (bedides vibrato) is palm pedal, volume pedal, what are these?

[Azrael]

HI

itz this strange thingy:
http://www.geocities.com/Nashville/6718/dbalde.html

i suppose it is kinda "control-center" where u can operate everything directly from yer guitar without footswitches.

and what a volume pedal is, is obvious, isnt it?

-=[Azrael]=-