new question! I would really like to reduce the left and right margins of the main center content area. What are my options? See areas marked in yellow in screen cap below. I'm running Moodle 3.6.3.
? From the screen shot it looks like you've already done this with something like:
Unless you then change the value of the selectors:
.course-content ul.ctopics li.section.main .side,
.course-content ul.ctopics li.tcsection .side
by changing the string:
$string['topcollsidewidthlang'] = 'en_us-28px';
in /course/format/topcoll/lang/en_us/format_topcoll.php then do a 'Purge all caches' or use Moodle's own language string editor in the UI to change that string for my Collapsed Topics course format.