If you have manually placed or edited loops, tick marks will not be automatically drawn on the new or moved loops. To have Design Master place tick marks, go to
DM Electrical 
Circuiting and Homeruns Redraw Tick Marks
Design Master will ask you to Select Device On Circuit. You may select any device on the same circuit as the loops on which you wish to have tick marks placed. Design Master will automatically update the tick marks on all the loops on that circuit. The command is complete.