Rep-ing

Sorry.. I am completely new here, I may be saying something completely obvious and dumb to you, but how do you increase/decrease people's reps? because I don't see any plus or minus button anywhere.... but somehow, when I press preview for my editting, I do see plus and minus buttons for mine. Weird.

Get 15 posts then you'll see it.

Oh look another rep thread~

Also this..

Wooh. thank you guys... I feel so dumb.