always check the documentation. tab at the top of the page it has alot of info.
http://krpano.com/docu/xml/#image
attributes for level:
•tiledimagewidth
image width of the whole tiled image
•tiledimageheight
image height of the whole tiled image
•details
individual details setting for this level
•download - settings for downloading tiles:
◦view - download only the tiles that are needed for the current view
◦all - download all tiles of the current level (not recommended)
◦auto - automatic, if imageheight is smaller than 2000 then all tiles are downloaded, if greater only the ones for the current view (=default).
•decode - settings for decoding the downloaded tiles:
◦view - decode only the tiles that are needed for the current view
◦all - decode all tiles of the current level (not recommended)
◦auto - automatic, if imageheight is smaller than 2000 then all tiles are decoded, if greater only the ones for the current view (=default).