Well normally, people tend to use this board to post photoshops
there is no rule to say you have to, but most of the people here are assholes who like to make up their own rules and shout at other people who break them.
You should probably start by reading the FAQ. It has not been updated for about 4 years, but might get you started in the right direction.
(prodigy69broke b3ta and made everyone leave,
Wed 15 Oct 2008, 23:45,
archived)
we have to make up our own rules now.
you are such a lazy bastard bob and won't update them ;)
(Pasanonic's been known to cause insanity in laboratory mice,
Wed 15 Oct 2008, 23:41,
archived)
It is so hard to try to rewrite the FAQ
when you know that people will ignore the important bits ("Don't be a cunt') and take the less important bits as some kind of divine law ("That image is 51KB! Be you chastised to hell!!").