(Note: With changeset 1586 the plugin used the new preferences instead of tag arguments.)
The internal backlinks plugin generates a horizontal backlink bar.
There are some usefull arguments you can use for change the output of back links. Use the following Parameters:
Here some examples:
You can easy customise the look of your backlink bar with Stylesheets. Look into the internal pages "backlinks" and copy&paste the CSS code from the internal pages into your global stylesheet and change it.