Sorry, there is no user manual, as I hoped that experimenting would indeed show you what does what. Try following the first 2 steps shown on the 'Scanner' or 'Image/File' tab, i.e. open/scan an image and click-and-drag to make a selection inside that image. Now you should see a tiled example under fine tuning, which you can use to align/scale the fabrics swatch to make it tile as neatly as possible.
Arnout
