PTViewer is one possible program for viewing panoramas
within web pages. Like Panorama Tools it is flexible, feature rich and free,
but requires an understanding of the options available to make the most of
it. This is the only viewer I will be dealing with in this tutorial as
it's the one I use. I won't be dealing with features I haven't used yet, nor
other viewers/authoring programs I don't use. No one said this tutorial was
comprehensive... ;-)