In this tree menu, each node has the link. Clicking one node, you can check the related information about tree menu. Now you can click the node one by one to get more details. But, so many linked pages that you need to view, maybe tired or no enough time, you must close the tree menu page when finishing the partial nodes, and continue to fulfill the rest next time.

Still remember the last node that you clicked in previous time? Most of us maybe forget it, but the tree menu can impress that node and prompt the viewers. Now please re-open the tree menu page, there is node with white background in the tree menu. That is the last node you viewed in the previous time, you can continue the rest from here.