You can change (or add) an Avatar to your account by either choosing one from the LoP Avatar galleries or you can upload one of your own.

The maximum dimensions for avatars are: 150x150 pixels.
The maximum file size for avatars is 250 KB. If you are currently using an uploaded avatar and upload another one, your old one will be deleted.

Remember that for uploading an Avatar you need to have your account activated.

Note: If you disable receiving PM's you won't be able to see this area.