Think of RBN Pipeline GIS like any online mapping service. For each map that you open, the system gives you access to certain features. You have three basic functions available to you. You can zoom in and out with the widget on the top left. You can select what features you want to see and what background (base map) you want to see it on with the widget on the top right. And you can scroll all around the map the way you would on any map application.
If you have other questions about how to use the mapping capability, click on the link in the bottom right corner Map Help.