Any content that displays on you profile is editable under "Profile" in your build menu. It will look like below. Note that all are optional and "About (site creator)" will be an automatic title on the page.
Photo: To select a profile photo, click browse and you will be brought to your File Manager. You will have to upload a file if you have not done so already.
If you want to remove an image click the box next to remove image so that the green check mark fills in. Saving changes will remove the profile photo.
Homepage: If you have another website, you can provide a link under your name by pasting the url into the "link:" section.
City: You can let other users know your location by typing it in this section.
State: You can let others know what state you are located in by typing it into this section.
Zip Code: City, State, and Zip Code, will make you more accesible to other users. By filling in a zip code, you will make yourself easier to find by users searching that zip.
About Me: This is where you can type whatever you want others to know about you. This is determined by what you put in the word box.