Hi Dan,
There are some adjustments in QU for font size related to Thumbs and added text etc. in Edit preferences.
W8, like W7 has a feature on Control Panel to adjust the size of text and W10 has a slightly more sophisticated feature, see on this forum:
However, I don't think any of this will solve the problem for these very high resolution small screens. I believe they are fairly new. What are other programs like, do they have the same problem?
Anyway, Mike, the developer of QU, checks this forum and will probably have picked up what you say, so sit tight and watch this space.
Terry