www.wysiwygwebbuilder.com

is there somewhere a introductory description about layers,
and choosing layer attributes?

can I have a page with layers
where each layer can be scrolled
when the cursor is in that layer?

For a good starting point see the following:
http://www.wysiwygwebbuilder.com/using_layers.html
http://www.wysiwygwebbuilder.com/morelayers.html