Hi,
You can move the _layer_s with the right mouse button or the free transform tool. If you want to move the whole rendered _layer_ you have to flatten that _layer_ and move the flattened one or move the _layer_ and move the center after that.
See 'Merge rendered' here:
http://www.mandalapainter.com/help3/_layer_s/Working%20with%20_layer_s.htmlThere's a demo version of the program that you can try and see if it fits your needs. To tell the truth the program should be $150 to worth for me... I worked more time with it than I earned.
Sorry for my slow response time, but I have lot's of work to do here...
Zoltan