Originally posted by vladimirjp before creating another thread, think and search. search the forums, search on google, or look in the manual. the manual as every definition u need to know in maya. as a matter fact ever option box / tool box in maya has a help menu in it. takes u straight to the documentation. relax a little. youre not the first one learning maya, so all youre asking were asked probably 1 day before you actually joined this forum. lol:p