Having made the dimension you wish to modify the current element, giving this command causes the Dimension Modification Form to appear, and the selected dimension is highlighted with four pickable ‘hot spots’ that allow modification of the DDEG, DTRA and DTOF attributes of the dimension. In addition, DTANG can be modified using the Text angle option button.

To modify the dimension, click on the ‘hot spot(s)’ that you wish to move, click on the new position (a transient image of the dimension will appear, which will move as the mouse is moved), then click on OK on the form. (Cancel allows the command to be aborted with no change to the dimension; Reset causes the position of the current ‘hot spot’ to be reset to its database position; Delete causes the current ‘hot-spot’ to be deleted or set to a default position.)

The form also contains the point construction Option list button that allows positions to be defined in terms of end-points, intersection points, etc.