Navigate to theme_more settings Create different combinations of settings Make sure each of those combinations work as expected Explore Moodle to make sure styles have been affected to all desired areas Style exploratory Test this in theme_clean and theme_more using IE9 and another browser Navigate to the following pages/elements, and make sure you do not see any CSS glitch or design issues: Home ► Site administration ► Users ► Permissions ► Define roles Theme selector pages The settings page of More (to check the colourpicker) The page listing the plugins (the border between Installed: 331 Disabled: 39 Add-ons: 5 ) Certification details part of the page describing a MNet peer (Home ► Site administration ► Networking ► Peers ► Integration Master PostgreSQL) The table "Configured store instances" in the Cache settings. The border of the blocks The calendar, calendar events and mini calendar pages On the page to edit a Tag , the dropdown with suggestions when adding a related tag. The page displaying the information about a badge that was issued The front page will all the different settings for frontpage or frontpageloggedin selected. (try smaller screens) The course management pages (also try different window sizes) The color of the fieldsets header in forms The messages pages The survey table of the survey module