Reorder (Move)
The Next and Prev menus allow you to move the currently selected page in the main window forward or backward by one page, respectively. The page order can also be changed by Drag&Drop operation. Select the pages you want to change, and then Drag&Drop them to the target position.
Rotate
The Left and Right menus allow you to rotate the currently selected pages on the main window left or right by 90 degrees, respectively.