Windows: version 10 Sumatra PDF: version 3.2 64-bit
A dark mode for Sumatra PDF is really easy – you just need to tinker with 3 lines of code in the settings.
Why Use Sumatra PDF?
In my opinion, it’s the best PDF reader. It’s small in size, super-fast and doesn’t have any annoying cruft.
Why a Dark Mode (Night Mode)?
If you code for long periods of time, then it’s really great to have your code editor run in dark mode. This greatly reduces the strain on the eyes.
But let’s say you are also following along an e-book, maybe a PDF and you switch to Sumatra PDF. The default setting is black text on white background. Immediately your eyes are shocked with bright luminescent white light. It’s as if you were relaxing in a room with the lights switched off and suddenly someone walked in and abruptly turned the lights on.
As you are coding along you have to switch back and forth multiple times between your PDF reader and code editor. It can be really jarring for the eyes and nerves.
How to Enable Dark Mode?
In Sumatra PDF, click on the Menu -> Settings -> Advanced Options
This should open the SumatraPDF-settings.txt file in your text editor. Change the following 3 lines under the heading FixedPageUI:
You are working on code or writing something important, you are in the flow, you reduce or increase the volume a bit for the perfect sound-level and pops-up this ugly big annoying Windows 10 volume control disrupting not only your thought process but captures the screen real-estate for 5 seconds before it fades away.
This is down-right evil and will no longer be tolerated 🙂 Well thanks to Marcus Venturi there is a way to disable this.