From Solid Edge Help:
Placing Coordinate Dimensions with Jogs:
To add one or more jogs while placing a coordinate dimension, first select the element you want to dimension, then hold the ALT key and click to add the jogs.
Adding Jogs to Coordinate Dimensions:
To add a jog to an existing coordinate dimension, use the Select Tool to select a coordinate dimension,Position the cursor over the dimension line where you want to insert the jog, Hold the ALT key and Click