Here is how to upload profile image and signature (short profile)
1. After logged in, click on you nickname. Then click on "View Member Info" tab. Then click on "Change Member Info" button.
2. On "Signature" section, write a short version of your profile. But you can basically write anything you want.
And then upload a picture for your profile image. 90 pixel by 90 pixel size is recommended but it will be resized if your upload is too big.
3. When finished, your Member Info shows your profile image and signature.
4. Now, whenever you post, your profile image and signature will appear at the bottom of your posts.