You can add text, watermarks, logos, or other images that appear in the same place in the background of every page of your document. These repeated elements are called master objects.
If your document is divided into sections, you can add different master objects to each section.
Add an object, text, or image to any page in the section, then drag it where you want it to appear on each page.
To add an image, first click Media.
Click the Style tab at the top of the sidebar on the right.
If you don’t see the sidebar, or it doesn’t have a Style tab, click
in the toolbar.
With the object still selected, use the Opacity slider to change the object’s transparency.
The more transparent you make the object, the more it fades into the background behind the document content.
Choose Arrange > Section Masters > Move Object to Section Master (from the Arrange menu at the top of your screen).
The object is moved to the background of every page in the section.
Master objects are locked (made unselectable), by default.
To edit or delete a master object, first make it selectable.

Choose Arrange > Section Masters > Make Master Objects Selectable (from the Arrange menu at the top of your screen).
Do one of the following:
Remove the object completely: Press Delete.
Lock master objects after editing: Deselect Make Master Objects Selectable so master objects can’t be moved or deleted by accident.
Keep the object but remove it as a master object: Choose Arrange > Section Masters > Move Object to Page.