On occasion, you may wish to `pop' back to the window from which this view was expanded. Conceptually, you can visualize expansion as adding this window to the top of a stack of windows. If you wish to pop off the top window from that `stack', you can do so in two ways --- pop back using the same window and pop back but put it into a new window.
To pop back into a new window, simply type meta-l meta-p anywhere in the window.
To pop back into the same window, type meta-l meta-P or click with the right mouse button anywhere in the window.