This video from MoodleBites works through how to utilize your browser and some quick CSS to edit and customize the Moodle Breadcrumb: the main navigation element available to users.
The video is part of a series of 11 themeing videos which are available from the HRDNZ Moodle Bites‘s Moodle-related Youtube Channel: https://www.youtube.com/playlist?list=PL85A5759CCB2856A8
Check it out at https://www.youtube.com/watch?v=HAm-zSku6Fg
