@david_hollis
You can pick an assignment in one of your courses and then go to add a rubric to that assignment. Click the edit button (pencil) and then you will get a Find a Rubric link at the top. Clicking that will list all of your rubrics from all of your classes. You can pick your course (hopefully you have unique course codes -- we do not) and then see a list of the rubrics from that course in the middle column. Once you pick a rubric, it will show on the right panel.
This all happens in a dialog box. You can resize the box horizontally, but enlarging it vertically only adds whitespace.
Once you've found the rubric you're looking for, you can go to that course and explore it further.