Hi there,
When meshing images, I usually find myself needing to make a lot of edge connections between vertices. Something like this...:
I first create all of those vertices by clicking in their desired positions, then I click-drag the mouse from vertex to vertex, releasing the mouse button every time a reach the second vertex.
My suggestion to speed up this process is to have a key modifier (like Shift or Ctrl) that automates the process of releasing and pressing again the mouse button when a vertex is hovered, so the final behavior is that I can travel along those vertices automatically creating edge connections between them.
I know this could seem a little whiny on my part, but you don't know how ever grateful I would be to have this feature for future meshing. I calculate about a third of time being saved by this alone, you know...
Thank you for reading.