Horizontal and vertical rulers let you check the size of objects in your documents. You can also create guides in your document, which are especially useful for lining up objects, such as form fields. You can change the unit of measurement and color used in the ruler.
Create new ruler guidesDrag down from the horizontal ruler to create a horizontal guide, or drag to the right of the vertical ruler to create a vertical guide.
Double-click a location on the horizontal ruler to create a vertical guide, or double-click a location on the vertical ruler to create a horizontal guide.
Show or hide guides
Move or delete ruler guides
Click the guide to select it, and
then drag it to a new location, or press Delete. To delete all guides,
right-click/Control-click in the ruler area and choose Clear All Guides
or Clear Guides On Page.
Change guide colors