Yes, so you must click on the aactual graphic icons of the nodes. That is, one of the little red (or other) rectangles. The result is a instant look at the contents of the node, with the ability to keep it open for as long as you like, and as many nodes as you like.
Really it the only way to keep from getting lost in a node tree. If you have tones of nodes and try to navigate them through the other way, you'll surely end up working on a node that you did not intend to do work on.