Adobe InDesign - Copying Master Pages From One InDesign Document To Another (2/CS)
Although you can't synchronize master pages in your booked InDesign documents like you can swatches and styles, there is an easy enough way to copy master pages between documents. Simply open the document that contains the master pages you want to copy, and then open the document to which you want to copy the master pages. Now, choose Window > Arrange > Tile (Window > Tile in Windows). Make the document that has the master pages you want to copy the active document and then drag the master pages from the Pages palette and drop them into the other document. Your work is done!