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Information:

  • Resolution: 1680 x 1050
  • Graphics model & driver: Nvidia Quadro K420
  • Monitor model: DELL 3007WFPHC
  • Connection type: DVI

This is the information for my current setup, but I am having the same issue on my Lenovo Thinkpad Carbon Gen7 that has no monitor, and is running 1920x1080 resolution.

I am running Windows 10 and use the window snapping feature quite often by holding down the windows key and using the arrow keys. However, an issue I consistently run into is when I snap a window to the left or right side of the screen, it almost always doesn't fill the window.

There was a similar question asked on Microsoft forums (https://answers.microsoft.com/en-us/windows/forum/all/multi-tasking-snap-not-resizing-windows-to-fill/50a7acfe-3c26-4586-81aa-1355c1015766) but the only response by a technician was to make sure the When I snap a window, automatically size it to fill available space setting is enabled, which I do have enabled.

enter image description here

Here are additional images from own PC of the behavior. You can see the top of the browser literally being cutoff from the monitor display in the first picture.

Not Fully Snapped Not fully snapped

Fully Snapped Fully snapped

Alex F
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  • probably there are some app that lays a transparent bar on top of the desktop, or there are some issues with the graphics driver? – phuclv Apr 13 '21 at 00:10
  • Use [Process Explorer](https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer) and drag the bullseye icon over the empty space. This will find the process whose window is taking up this space. If that process is `explorer.exe`, this means the desktop, so that space is truly empty and snap isn't working correctly. – harrymc Apr 14 '21 at 20:13
  • Snapping for me DOES fill the whole area, however I DO still get the resize-arrow-cursor at the top & is cut off just like yours so this is normal. Is the screenshot from your PC or a random one on the internet? I see the black bar at top, however since your resize-arrow-cursor is getting cut off I am wondering if its been edited into the photo? Maybe your monitor settings need to be adjusted, but even if YOU saw black bar at top a screenshot wouldn't capture that. Please provide another screenshot AFTER you adjust one of the snapped windows to be maximum height – gregg Apr 16 '21 at 13:41
  • Can you update question with your: 1)Resolution. 2)Graphics model & driver . 3)Monitor model & connection type (VGA, DVI, HDMI, DP) – gregg Apr 16 '21 at 13:51
  • @gregg I added additional images of my PC. You can see the browser is being cutoff at the top of the monitor. It appears to be trying to resize to resolution larger than the monitor and then after snapping the window again resizes to the correct resolution. – Alex F Apr 16 '21 at 13:52
  • @AlexF Indeed I'm seeing that. Can you go to Settings, System, Multitasking then: 1)uncheck 'When I snap a window, automatically size it to fill available space'. 2)uncheck 'When I resize a snapped window...' 3)Turn off Snap windows. 4)Reboot. 5)Re-enable those settings. 6)Cross your fingers it did some magic. If that doesn't work I'd look at updating your video drivers & trying to login to the PC as another user to note if it happens, various preferences are user-specific – gregg Apr 16 '21 at 13:56
  • Could you do the test in my above comment, for more information? – harrymc Apr 16 '21 at 15:21
  • @harrymc I tested your solution and it's giving me explorer.exe. It's strange too because I have the same issue on my laptop which is a completely different display and PC model, but both are running the latest Windows 10 build – Alex F Apr 16 '21 at 16:36
  • @AlexF if it's happening on your laptop & another PC sadly the common denominator is you. 1)Do you have any custom Windows GUI modification tools installed (ie. stardock, etc.)? 2)Are you using the Windows beta build/update channels? 3)Have you checked the Nvidia Control Panel? 4)Have you updated those drivers? – gregg Apr 16 '21 at 19:24
  • Use `regedit` to navigate to registry key `HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics`. Check if your values are very different from in [this post](https://superuser.com/questions/954408/default-registry-values-for-windowmetrics-in-windows-10). If you wish to experiment, export first the `WindowMetrics` key to a file as backup. Or you could take a screenshot and add it to your post for us to take a look. Sometimes setting `PaddedBorderWidth` to `0` helps. – harrymc Apr 16 '21 at 20:13
  • Id troubleshoot by using raw drivers. IE: removing GPU Tool/settings app. (IE: Nvideo settings or Radeon Settings etc.) – TardisGuy Apr 18 '21 at 22:25
  • @AlexF: Any answer to my last comment? – harrymc Apr 19 '21 at 08:18
  • @harrymc setting the `PaddedBorderWidth` and `BorderWidth` to 0 solved the issue for me. If you'd like to post an answer I'd be happy to award you the bounty. – Alex F Apr 19 '21 at 19:37
  • Answer was posted. – harrymc Apr 19 '21 at 19:46

1 Answers1

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The Windows metrics for displaying graphic windows can be found under the registry key HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics.

The problem here was solved by setting PaddedBorderWidth and BorderWidth to zero (0).

The units for these values are in twips and may contain as value any negative number up to 0. A value of 0 will produce no padding, while for example a value of -300 will produce a very fat border. PaddedBorderWidth should be larger or equal to BorderWidth.

The limits are:

  • BorderWidth - valid values are 0 to -750
  • PaddedBorderWidth - valid values are 0 to -1600

enter image description here

harrymc
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