Point to Point Marker Selection

[ccollin]

I've been trying to figure out how to select the marker on a point to point dimension so I can resize it specifically to the length I need. Any video I've seen shows to select the dimension line and hit the "tab" key in order to move from the dimension line to the next object marker. However, when I do this it just selects the next object in the plan or, if I'm outside of the plan, doesn't select anything. Scratching my head. Any suggestions welcome. Thanks!