A search for "reset camera" would have brought
this old reply to such a question...
Also, reading the
Cool VL Viewer features shortcuts topic would have brought the reply, as well as more hints to adapt yourself to the viewer and its peculiarities.
Having archives is the big advantage of a support forum in comparison to SL groups or whatnot, but it supposes that people read the help topics and use the search feature to find the reply, before posing again the same, old question...