Daily theme, how remove author box in category page and post

Hi,

I want to remove author's box in post. Also I want to remove author's box from category page. And how to make that text width in post would be same like text width in page.

Can you give me examples, how remove and change text with, because at this time I can't insert big photos, there is no space in post.

Sorry for my poor english.

Thanks for answers