Creating Aligned Dimensions
To create an aligned dimension
- From the Dimension menu, choose Aligned.
- Press ENTER to select the object to dimension, or specify the first and second extension line origins.
- Before specifying the dimension line location, you can override the dimension direction and edit the text, the text angle, or the dimension line angle:
- To rotate the extension lines, enter r (Rotated). Then enter the dimension line angle.
- To edit the text, enter mtext. In the Multiline Text Editor dialog box, revise the text and choose OK. Editing within or overwriting the brackets (<>) will change or remove the dimension value calculated by AutoCAD LT.
Adding text before or after the brackets will append text before or after the dimension value.
- To rotate the text, enter a (Angle). Then enter the text angle.
- Specify the dimension line location.
Dimension toolbar: 
Command line equivalent: DIMALIGNED