Quick links to procedures on this page:
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The on-screen rulers provide a visual reference to help you size and position images, objects, and editable areas. You can display or hide the rulers at any time. As you move the pointer in the image window, marks on the rulers indicate its position. You can also customize the rulers’ zero mark position and specify a unit of measure for the current document.
You can move the rulers anywhere in the image window; however, by default they display along the top and left sides of the image window. Calibrating the rulers ensures the distances on the screen match real-world distances.
| To display or hide the rulers |
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Click View |
A check mark beside the menu command indicates that the rulers are displayed. |

The rulers displayed.
| To display the rulers by default |
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Click Tools |
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In the Workspace list of categories, click Display.
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Enable the Show rulers by default check box.
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| To customize the rulers |
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Click Tools |
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In the Document list of categories, click Ruler.
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In the Units area, choose a unit of measure from the following list boxes:
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Horizontal
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Vertical
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If you want to use the same unit of measure for both the horizontal and vertical rulers, enable the Same units for horizontal and vertical rulers check box. |
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In the Origin area, type values in the following boxes:
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Horizontal
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Vertical
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The origin value indicates the distance, in the units of measure you specify, between the zero mark of the ruler and the point of origin of the ruler. For example, an origin value of 4 for the horizontal ruler moves the zero mark of that ruler four units away from the origin — the point where the ruler begins. |
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Type a value in the Tick divisions box.
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If you want to display fractions on the rulers, enable the Show fractions check box. |
| To move a ruler |
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Hold down Shift, and drag a ruler to a new position.
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| To calibrate the rulers |
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Click Tools |
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In the Document list of categories, click Ruler.
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Click Calibrate rulers.
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Hold a clear plastic ruler next to the horizontal and vertical rulers displayed on
your screen.
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Type values in the following boxes so that one inch on each ruler corresponds
exactly to one inch on the plastic ruler:
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Horizontal
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Vertical
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