Update Version 1.7.3 !
-Now you can shift your grid plane to any vertex !
When you Ctrl + Click an edge to set it as alignment edge, sometimes you want to shift the plane along the alignment edge to match its end point, now you can do it !
Now you can Shift key + Click on a vertex, it will shift the grid plane to match the vertex position, so that vertex will be on grid line!
let say you are using an alignment edge now, but it does not fit well.
before this update, you have to switch to Relative Size mode for good fit.
Now you can Shift + Click a vertex on its end, it will shift grid lines to that vertex!