Suggestion About Main Class Change(Exchange main/subjob)

[xSunShineZ]

Hello,Everyone

I will appreciate u gms if u can finally answer my questio nafter pming u handred of times.
Well,when im logging with my game account theres some option that i can do with using rurs,some of them are:name change/change e-mail/change pass/Change char's account,and theres one more option that i cant really understand,this option is:Exchange Main/Subjob,and the question is if i choose this option,can i change my main class?And if i can do this...do i have to choose my new main class from my subclasses?
Appreciated.

Best Regards,
xSunShineZ

[Sabor]

http://www.lineage2.com/archive/2008/04/choose_your_des.html

you can change ur sub to main. not the lvls though

[Shabaka]

and SEARCH.