Windows 10 - Surface Pro 4 with Surface Dock and 2 external monitors - cannot drag anything to one external monitor

LeighWardle used Ask the Experts™
Hi Experts,

I’ve got a  Surface Pro 4 running with a Surface Dock and 2 external monitors.

Looking at Advanced Display Settings:

Clicking Detect shows:

monitor 1 is the Surface Pro
monitor 2 is the Left external
monitor 3 is the Right external

Multiple displays is set to:  Extend these displays

My problem is that I can drag apps and windows between monitor 1 and monitor 3.

But I cannot drag anything to monitor 2 (it just shows the standard Windows 10 background and nothing else).

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Distinguished Expert 2018

What happens if you try to drag? Does the mouse pointer stop moving right at the border of that screen? Could it be that your monitor 2 is indeed not left of 1 but right of 3?
Most Valuable Expert 2015

Or to expand to the above, on top or below?


Sorry for the delay in responding - I have been traveling, without access to the external monitors.

Here are the monitor numbers as given by the Identify command:

Monitor numbers as given by Identify command
I can drag items up from Monitor 1 to Monitor 3.

But moving the mouse on Monitor 3 is blocked on the left and top boundaries.

I have been able to get the mouse to appear on Monitor 2, but only after a convoluted journey starting at the bottom of Monitor 1.

Does anyone know the significance of the arrangement of the tiles representing the monitors?

Here are 2 examples:
Tile layout 1
Tile layout 2

It's easy to drag and drop the tiles, but does the layout have any significance?
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Most Valuable Expert 2015
Yes, the layout does have a significance. Another important factor is the resolution of the different displays. One of them has a much larger resolution than the others, and then to move the cursor from one display to the other you must move so that you have a "through way". Otherwise it will be like bumping into a wall.
Distinguished Expert 2018
Right so. The surface own display, though it is the smallest, has the highest resolution. So that is why you see this effect. Maybe you should only use the 2 external screens when docked. If you needed 3 of the same resolution, that would mean you needed new, high end monitors.


I'm happy now - I can move the mouse and objects smoothly across Monitors in the order 1, 2, 3.

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