Frequently, the default position for dimensions is not adequate. Several methods are available for editing dimensions.
To control wrong extension line points, text, and dimension line positions, the best method is to select the dimension, without command, and move grips. In the following diagram, the horizontal dimension is wrong due to an incorrect extension origin. We select the dimension, activate the grip (turns red) and move it to the correct position.
PROPERTIES palette is excellent for editing the geometric properties of some dimensions and controlling text contents and text angle.
Just to edit text contents, we can also ...