i was thinking something on the bottom right, or a moveable window or something idk
Maybe calculate and show the x,y & z coordinate-difference comparing the current and the previous saved coordinates.
Like if you moved 24 north, 10 west and 7 plates up, it would say something like:
X = -10
Y = 24
Z = 2.33
Then you don't need to manually press the button to move for it to calculate, just placing the ghost brick somewhere else would calculate the distance.