You only get the transpose line (orange, three circles), when you are in
Move,Scale or Rotate mode.
To move vertices, you must be in Draw mode (Edit + Draw pressed), and
use the Move (or possibly the Nudge) BRUSHes.
To clear the transpose line when in one of the transpose modes, you simply
click once on the model, but I don’t think that’s your problem here.
Also affecting the move brush are…
- Z-Intensity slider (the higher it is, the easier the move)
- ‘Picker Sample Size’ in the preference menu, setting this down to 1 can
help avoid some issues with vertices that won’t move.
G.