Expert Mode in table matainance generaator??

Hi

Plz tell me abt the epert mode of MG.

if i make it,than my MG will keep working if in future new fileds are added or deleted or changed frm my table or,every time i hv a make anew MG.

Plz tell me if i specify the MG in expert mode,it will take care of all changes,deletion & addition of fileds or not?

regards?