Regardless of whether you wish to undo terrible mistakes or remember how something looked in bygone days, it can sometimes be very useful to have access to old versions of your custom CSS files. Fortunately, every time your CSS is updated in the Theme editor, Igloo creates a new version number for your CSS and stores the old one. 

You can always access the base Igloo CSS through the Theme editor, but this contains none of the themes that you started with or any customizations that may have been added.

If you would like to access previous CSS versions that have been implemented in your community, you can do so via the following process:

First, view the source code on any of your Igloo community pages. In most browsers, you can do this by right-clicking anywhere on the page and selecting  "View Page Source."  Within that source code is hiding a path to your custom CSS.

Next, search for the URL of the custom CSS. The easiest way to find it is by hitting Ctrl-F or Cmd-F and searching for "customcss". This should find the URL where your custom CSS is stored. 

Once you have found the URL, copy that full path and navigate to it in your browser, you will see your full, current custom CSS. All you need to do from there is to change the version by editing the last number in the URL; the lower the number, the earlier the version.

If a community's css has been changed with the Wallpaper editor, you'll need to navigate back to the Advanced Theme Editor and publish the css there for these steps to work. the customcss version doesn't appear in communities using the Wallpaper Editor.