Rulers are useful when you need to accurately place objects or guides in the document view.
To show or hide rulers:
From the View menu, select Show Rulers. A check mark is displayed next to the menu item when the rulers are visible.
To reposition the spread origin:
Do one of the following:
Drag from the default horizontal/vertical ruler intersection at the top left of your document view to position the spread origin on the page. If snapping has been activated, the spread origin will be able to snap to objects on the page.
From the View menu, access Guides. Enter X and Y values into the Spread Origin section.
