Can you change the order of images in contact sheet in Lightroom 4 Print module?
In Library- Grid View change to User Order and arrange your photo's by dragging them to the right place, either in the grid or on the filmstrip.
Frans is correct, but you also need to be in a collection, or the lowest level folder of a tree to access User Sort. If you're coming from a folder above this level, you won't be able to sort.
Europe, Middle East and Africa