Ruler guides (or simply “guides”) are nonprinting guidelines that you can position manually. You can create ruler guides by dragging them off the horizontal and vertical rulers (View > Rulers). You can create ruler guides on master pages and on individual layout pages.

• To create a horizontal ruler guide, click the top ruler; when the pointer displays, drag the ruler guide into position on the page. To create a vertical ruler guide, click the vertical ruler, and then drag the ruler guide onto the page when the pointer displays. If the Measurements palette is open when you drag a ruler guide, the guide’s position is indicated in the X field (for vertical ruler guides) or the Y field (for horizontal ruler guides).
• If, as you create a horizontal ruler guide, you release the mouse button when the ruler guide is positioned over the pasteboard, the ruler guide will extend across the pasteboard and all the pages in the spread. If you release the mouse button when the horizontal ruler guide is positioned over a document page, the ruler guide will display only on that page.
• To reposition a ruler guide, click it, and then drag it to a different location when the guide pointer displays. You can also double-click the ruler guide with the Item tool selected and enter a new location into the Guide Manager Pro dialog box.
• To remove a ruler guide, drag the guide off the page.
• To remove all ruler guides from a page, scroll until a portion of the page displays, then press Option/Alt and drag the guide back on to the ruler.
• To remove all ruler guides from a spread’s pasteboard, scroll until a portion of the pasteboard displays, then press Option/Alt and click a portion of the ruler.

See also “Guide Manager Pro.”