Editing

Editing

Open the GitHub-Dark.css & your desired minified syntax highlighting theme (found in the themes folder) files in your favorite editor, then:

• Start a search in your editor for ]]*/ (it's the end of the userstyles placeholder).

• When you find /*[[bg-choice]]*/, replace that entire line with

  background-image: url() !important;

then insert the URL of your selected background image (please see Image wiki page for more details).

• The /*[[bg-options]]*/ and /*[[bg-options2]]*/ can be replaced with the background-size, background-repeat, background-position and background-attachment settings, as desired.
• When encountering /*[[base-color]]*/ #4183C4, replace that entire selection with the desired base color which is essentially applied to all links and selected panels.
• Then the /*[[tab-size]]*/ 4 placeholder can get replaced if you want to change the pre code tab size.
• Lastly, the /*[[syntax-theme]]*/ will require you to remove everything from that placeholder to just before the closing bracket } at the end of the file, then replace it with the style from your selected syntax highlighting theme.

A little bit more detail is provided on the Update wiki page, see steps 2 through 5. The rest of the steps are instructions for the other admins on how to update the style at userstyles.org.