After opening Resolve for the first time since I have upgraded to an UHD-monitor I noticed that 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.


11 Comments

JC · 28th December 2020 at 03:11

What an easy and helpful fix. Thanks a lot!

    Himbeer · 28th December 2020 at 11:14

    You’re welcome!

Chris Brearley · 20th November 2020 at 18:46

Here’s how Resolve scaling works. If your Windows scaling is set to 100-125% then Resolve will stay at 100% – far too small for UHD screens but works for HD and large 2.5k screens. If your Windows scaling is 150%+ then Resolve will scale to 200% – far too big for something like a 32″ UHD monitor. What Resolve really needs is a 150% scaling option. Blackmagic have known this but have chosen to neglect it for years. The best option I have found is to override the hi-dpi settings and change it to System. This will give you the 150% scaling that Resolve so badly needs but with the caveat of everything being every so slightly soft and it throwing up some issues if you use a Wacom tablet.

    Himbeer · 21st November 2020 at 18:43

    Thank you for your informative comment. I didn’t want to include the “System” option in my post because, as you said, it makes the window very blurry (especially noticeable on large monitors). You are completely right though, 100% on resolve is too small and the 2x scale that can be achieved with this post or by setting Windows to 200% is almost a bit too big. It will launch with the scaling set to 1.5, but as I mention in the post, some of the icons are completely broken when you do that.

Mayberry Jones · 17th November 2020 at 03:32

Forgive my ignorance but what do you mean when you say “Replace the Target with the following” , what is the Target and how do i replace it with the following

Thanks in advance

    Himbeer · 17th November 2020 at 08:41

    I hope this GIF helps: https://imgur.com/DfsfXZ6
    (sorry for it being German)
    Feel free to just ask if you need more help.

Nathaniel S · 14th November 2020 at 19:47

I didn’t even bother using DaVinci Resolve because of the small fonts on the user interface. Just made my eyeballs come out.
Now, this solved the problem. I can use DaVinci once again.

    Himbeer · 15th November 2020 at 11:13

    I’m glad I was able to help!

Daniel Rose · 2nd November 2020 at 05:25

Your solution is LIFE CHANGING for me! It absolutely works.
I can’t thank you enough for posting it.
I have seriously impaired vision, but now I will be able to edit and learn faster.
I don’t think I found this on the Blackmagic Forum for Davinci.
I will check again. I hope it will be alright if I put a link or something to this page.
Thank you Thank you. Live long and prosper….

    Himbeer · 2nd November 2020 at 10:04

    Thank you for your nice comment! I’m glad I could help. As far as I know, the most popular forum thread already has a link to this post, but feel free to share it to others, too. It’s a shame Blackmagic still didn’t fix this problem.

Christos Miniotis · 26th June 2020 at 13:54

I don’t know why this doesn’t show up on Google. This is the only solution for now, Thanks for posting this! Got Resolve to work on my Surface Pro 4, where the scaling wouldn’t force to 200% even though my Windows Scaling was set correctly.

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