Confluence applied CSS classes - what are they doing?

[Kris Fininen]

Confluence often adds the below classes to its HTML when viewing the source editor.

<table class="relative-table">

<table class="wrapped">

<p class="auto-cursor-target">

We are unable to determine what these classes are doing. Even using the developer tools  feature in the browser doesn't help - the classes are shown as being applied but they're not shown in the styles details. Nor could we find these classes in batch.css.

The only class we discovered we regularly need is the 'relative-table' class. This seems to prevent  misaligned table column borders for centered tables in our Scroll PDF exports, but we don't know what attributes are applied when using this class.

There are many more classes applied to Confluence content - is there a Confluence CSS class reference somewhere?