1. Think of the map as kind of like a spider's web with a page attached to each spot on the web.

Don't try to hold the whole structure of the map in your head -- just use it for navigation.

2. The elements of the map are color-coded.

3. The Views menu (in the top navigation bar) allows you to choose among many different views. 

Click on the boxes or bubbles (depending on which view you are in) to move around and bring up the attached Details page.

In the Explorer views, arrowheads give direction.

Recommendations:

Page View: good for phones

Outline View: good for fast navigation on lap/desktop and tablets

Explorer Views: A spatial view for lap/desktops and tablets

4. If in the Explorer Views the map seems to wander off the background click-and-drag the background to move it and bring it back on (or use the magnification slider).

Note also:

1. Maps are always open to update and are, therefore, rarely "published" in the traditional sense.