You can draw dimension lines to indicate the measurements of objects in a drawing, such as length, width, height, depth, and distance.
Dimension lines indicate the measurements of objects in a drawing.
You can add several types of dimension lines:
| • | Vertical or horizontal dimension lines — measure the vertical (y-axis) or horizontal (x-axis) distance between any two nodes. |
| • | Parallel dimension lines — measure the actual distance between two nodes. |
| • | Angular dimension lines — measure angles. |
| • | Radial or diametric dimension lines — measure the radius or diameter of a circle or a partial circle. |
Arrowheads are reversed when a dimension line is too small.
For more information about formatting lines, see Formatting lines and outlines.
| To draw a vertical, horizontal, or parallel dimension line |
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| 1 . | Click the Dimension tools button, and click the Horizontal or vertical dimension tool  or the Parallel dimension tool  . |
| 2 . | Click to place the starting point, and drag to where you want to place the endpoint of the dimension line. |
| 3 . | Move the pointer to position the dimension line, and click to place the dimension text. |
| By default, the dimension text is centered on the dimension line. |
| To draw an angular dimension line |
|
| 1 . | Click the Dimension tools button, and click the Angular dimension tool  . |
| 2 . | Click where you want the two lines that measure the angle to intersect, and drag to where you want the first line to end. |
| 3 . | Click where you want the second line to end. |
| 4 . | Click where you want the angle label to appear. |
| To draw a segment dimension line |
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| 1 . | Click the Dimension tools button, and click the Segment dimension tool  . |
| 2 . | Click the segment that you want to measure. |
| 3 . | Move the pointer to where you want to position the dimension line, and click where you want to place the dimension text. |
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Using the Segment dimension tool
, marquee select the segments, move the pointer to position the dimension line, and click where you want to place the dimension text. |
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Click the Automatic successive dimensioning button
 on the property bar, and marquee select the segments that you want to measure. Move the pointer to position the dimension line, and click where you want to place the dimension text. |
Segment dimension lines can be applied automatically to selected successive segments.
| To draw a radial or diametric dimension line |
|
| 1 . | Click the Dimension tools button, and click the Radial dimension  or Diametric dimension  tool. |
| 2 . | Click a circle or an arc, and drag to where you want the line to change direction. |
| You can hold down the constrain key while dragging to constrain the leader line to the current constrain angle. |
| 3 . | Move the pointer, and then click to place the dimension text. |
| If you want to add a symbol to the dimension text, choose a symbol from the Dimension symbol list box on the property bar. |
If you transform a circle to an ellipse after applying a radial or diametric dimension line, the dimension measurement does not appear. When you transform the ellipse back to a circle, the correct measurement is displayed.
Examples of radial and diametric dimension lines
| To set the display of dimension units |
|
| 1 . | Select a dimension line. |
| 2 . | On the property bar, choose options from the following list boxes: |
| • | Dimension style — lets you choose fractional, decimal, or standard dimension units |
| • | Dimension precision — lets you choose a level of precision for the measurements |
| • | Dimension units — lets you choose the unit of measurement |
|
Click the Display units button
 . |
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Click the Text position button
 on the property bar, and choose a text position. |
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Select the dimension text using the Pick tool
 . On the property bar, choose a font style from the Font list box, and type a value in the Font size box. |
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Type a prefix or suffix in the Prefix or Suffix box on the property bar.
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Click the Show leading zero button
 on the property bar. |
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Click the Dynamic dimensioning button
 on the property bar. |
| To customize extension lines |
|
| 1 . | Select a dimension line. |
| 2 . | On the property bar, click the Extension line options button  . |
| 3 . | To specify the distance between the extension lines and the object, enable the Distance from object check box, and type a value in the Distance box. |
| 4 . | To specify the length of the extension overhang, enable the Extension overhang check box, and type a value in the Distance box. |
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