Swap Points
Use the Swap Points option to swap (interchange) the points defining a dimension object. It has the effect of inverting the dimension object.Instructions
On the Design menu, point to Dimension, and then click Swap Points.
Select the dimension object.
For line and radius objects, this option interchanges the start and end points of the object. For angle and arc objects, the option interchanges the radius and sweep points. Diagrams 1 and 2 illustrate the effect of swapping points on a line dimension object.
Figure 1 : Dimension Object prior to swapping points
Figure 2 : Dimension Object after swapping points
Once the points are swapped, you will then be asked whether or not to retain the changes. Upon confirmation, you can select another dimension object.