With a JustFollow subscription you can make your profile your own: colour your nick, show a subscriber badge next to it and upload an animated avatar and banner.
Nick colour and badge can also be set in your account, under Settings.
First pick a brush:
Then click Fill the whole nick, or drag the brush across letters to paint only those. This way your nick can mix several colours. The post preview at the top of the tab shows how others will see it.
Undo strokes returns the nick to the last fill, and No colour brings back the plain white nick. Your own colours and gradients are saved in the palette.
The badge sits next to your nick. By default it is the JF mark in your nick colour. You can upload your own picture instead: GIFs up to 256 KB, other formats up to 4 MB, and you can crop it after uploading. Your last three badges are kept so you can switch between them. If you don't want a badge, choose Hide.
Hovering the badge shows “JustFollow subscriber”, and clicking it opens the subscription page.
On the Appearance tab click your avatar or banner and choose a GIF. For subscribers the GIF is uploaded as is, without cropping, so the animation is kept.
Without a subscription you can still pick a GIF, but only its first frame will stay in your profile.
To make your profile look good:
Your nick colour, badge and animated avatar show in the feed, in comments and in your profile. The animated banner shows in your profile header.