After opening Resolve for the first time since I have upgraded to an UHD-monitor I noticed hat something was off: Everything is way to small even though I had set my display scaling in Windows to an appropriate value.

DaVinci Resolve window with very small text
DaVinci Resolve window with very small text

Apparently Blackmagic didn’t implement High-DPI scaling correctly, even in the latest version. A quick internet search didn’t give me a viable solution either, but after a while of research I finally found something that works:

The solution

Thanks to this post I had the idea that maybe changing some QT Environment variables would help and although that person had a great idea, they didn’t find a solution.

A search for “QT_AUTO_SCREEN_SCALE_FACTOR resolve” lead me to this post which explains how to fix the scaling issue on Linux. I thought: Why not try this on Windows? So I opened a PowerShell window and used these commands to set these environment variables:

cd "C:\Program Files\Blackmagic Design\DaVinci Resolve\"
$Env:QT_DEVICE_PIXEL_RATIO = 2
$Env:QT_AUTO_SCREEN_SCALE_FACTOR = 1
.\Resolve.exe

Et voilà, it worked!

DaVinci Resolve window after enabling 2x scaling
DaVinci Resolve window after enabling 2x scaling

But obviously we don’t want to tediously enter these commands into a PowerShell windows every time we want to use Resolve. Luckily we can just add them to the shortcut that opens Resolve:

  1. Right click and open the properties menu of the shortcut you want to change
    • If you want to edit the start menu shortcut you will need to right click that one and press “Open file location” to get to the actual shortcut.
  2. Replace the Target with the following: powershell.exe -WindowStyle Hidden "$Env:QT_DEVICE_PIXEL_RATIO=2;$Env:QT_AUTO_SCREEN_SCALE_FACTOR=1;start 'C:\Program Files\Blackmagic Design\DaVinci Resolve\Resolve.exe'"
    • You may need to change the path in here if you have Resolve installed at a different location
  3. Press “OK” to save your changes

From now on, when you start Resolve from this shortcut, it will display with correct scaling.

Note: You may need to redo these steps after installing an update for Resolve

Another note: Setting scale factors other than 2 will work, but non-integer ones will make some text and all images look very pixelated.


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