How do I add a fanart?
First, you need to register as a fan artist. Then, find a manga you'd like to support and request permission to draw for it by clicking the "Add Fan Art" link in the top right corner of the manga's description. Once you've received permission to draw for the work (which, depending on the artist, could be instantaneous) you'll be able to upload your fanart. From your "My Page," click on the "Publish" button either on the far left end of the grey menu bar or from the yellow buttons on the right side of your screen. Select the "Fan art" tab and then click the blue button to upload your art. Your file will be viewable by the public as soon as it has received approval.