When guides are active with Snap To checked in the Page menu, the sides of the object that you draw snap to the closest guides that are within a preset Snap To zone. To snap to the guide, the object gets larger, so if you draw a square in a Snap To zone the side closest to the guide extends the square to become a rectangle. To avoid this effect, create the object outside the Snap To zone and then move it to snap the entire object to the guide.

1. Make sure the guides are visible and Snap To in the Page menu is checked. To snap to layout or other guides on a master page, check Use Master in the Page menu.

2. Arrange or add any guides that you need.

3. Select the text block tool, picture block tool, or a drawing tool.

4. Place the pointer near the guide that you want to snap to.

5. Drag to draw the object. You can use guides to align one, two, three, or all four sides of an object (or two ends if it's a rule). Or use a guide to align the sides of several objects.