Is there a way you can edit a post after you put one up?

I did a poor job of spell checking a couple of posts. MY BAD.. Rather than looking like an idiot, I wanted to change my post, is there a way to do so? If there is I am blind, which is probably the case.

There is an edit tab... It is The second grey box on the upper right. Next to the quote box. Don't worry I use it all this time as I am a poor typer and sometimes I forget to proof read. Let me know if you have trouble finding it...

Yup what Dave said.