To see all the terms in Mandala, open the Terms tab within the search flyout. You can open the flyout anywhere in Mandala by clicking the search icon in the top right corner.
Step-by-Step Guide
If the search panel isn't expanded, click the search icon anywhere in Mandala
The search panel will expand
Open the Terms tab
You'll see a list of terms
Use the + and - buttons to explore the terms tree
Click on an item on the tree to open the term's page in Mandala