Blog help needed...

Anyone know how to make an "About Me" page using Blogger? I'm not absolutely sure I even want an About Me page, but someone who read the blog suggested it... I read through Blogger's knowledge base, but couldn't find this crucial piece of information. What I am looking for is how to make a little window/box pop up when you click on a link. I know how to make a link; it's the box that the link links to that I am unsure of.