HOW TO Create master objects
Add a regular object
Add an object to a page in the section of your doc where you want it to appear, as usual. Click the object to select it, then use the Format inspector’s tools to adjust its presentation – lower the Style tab’s Opacity slider to make a watermark, say.
Make it a master object
Select the object, go to Arrange > Section Masters and choose Move Object to Section Master. It’ll now appear on every page – but only in that section of the doc; this enables you to have different master objects in each section.
Refine master objects
Choose Arrange > Section Masters > Make Master Objects Selectable to edit masters (or lock them again). To return a master back to a regular, use Section Masters > Move Object to Page; copies are created on all the section’s pages.