How do I increase the font size for a specific application in Ubuntu 18.04 running Gnome?

by Caleb Jay   Last Updated July 12, 2019 23:02 PM

I installed the Unity Editor on my Thinkpad x1 Carbon, which has a resolution of 2560 x 1440, and is considered HiDPI. In order to deal with very small font sizes, I installed gnome-tweak-tools and set my Fonts Scaling Factor to 1.34. This has resulted in an acceptable font size in every application I have tried so far, with some tweaks in programs like Firefox.

However, the Unity Editor doesn't have a font size modifier for its UI. It looks like this on my machine:

Screenshot of Unity Editor on a Thinkpad x1 Carbon running Ubuntu 18.04 with Gnome

The font size is unreadably small.

I see that under gnome-tweak-tools, I can set font sizes specifically for things such as "Window Title" or "Document," but not, for example, "Unity Editor."

I could set "Scaling Factor" very high but this makes other programs have unacceptably large fonts.

I could modify, under the regular Settings app, under Displays, the Scale property, from 100% to 200%, but this makes every other application have a terribly bloated, nearly unusably large UI.

How can I change the font size for only one application, specifically, Unity Editor?

EDIT: By the way, there does not appear to be any intention on the Unity Editor engineering team to implement a font size changer:

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