To create an aligned dimension

1. Do one of the following:
• Choose Insert > Dimensions > Aligned.
• On the Dimensioning toolbar, click the Aligned tool ().
• Type dimaligned and then press Enter.
2. Press Enter, and then select the entity to dimension.

Or, you can insert the dimension by specifying the first and second extension line origins.

3. Specify the dimension line location.

To insert an aligned dimension by selecting the entity, select the entity (A) to dimension, and then select the dimension line location (B).		Result.

To insert an aligned dimension by selecting the extension line origins, select the first extension origin (A), select the second extension origin (B), and then specify the dimension line location (C).	Result.