How do you change your channel info about ur self on youtube?

i wanted to change what my age and my music i lik is on youtube but i forget how can someone help me?!?!?How do you change your channel info about ur self on youtube?
Wrong section but, if you've got the Beta channel design there's a little edit button in the info box and you just use that but if you have the old channel design you click account and then profile setup. I don't think you can actually change your age but you can just say what your age isHow do you change your channel info about ur self on youtube?
there's a big, yellow, edit channel button on your profile.

where did my folder walk

is the iran control to have two laptops