I ran into this problem a few weeks ago where I need to show the Grid line in a detail but the bubble need to be empty. I look to see in I could find something but I did not have in luck. some I work on this.
This is a 2D component Grid Center Line, it can be used as Grid and to indicate the center of beam, Slab Columns, etc. It has some visibility parameter so you can manipulate witch ever way you want on your detail. Also I made slope arrow that you can rotate, flip vert. & horiz. and also has visibility parameter for the text.
I uploaded the two families if you need them. I hope they served you well.
