Welcome to the Joulescope forum, and thank you for backing Joulescope! Also thanks for the kind words. I hope that you find your Joulescope to be very useful!
That text is very small. The code currently sets “high DPI” support for Windows, but it appears to not do this for macOS or Linux. I will investigate. I also plan to make the text features (font, size and color) configurable, but this is not yet available. I added this issue to the list and will address it in a future release. Thanks for the feedback!
I received quite a bit of feedback relating to zooming and navigation from the beta users. The common feedback was that the old method was confusing, complicated, and not intuitive. I greatly simplified zooming and navigation to just use the mouse (no onscreen buttons). In the process, I did remove the click and drag operation for zoom shown with earlier software in the older YouTube videos.
With the 0.4.x software, scroll to zoom, click and drag to pan (except in live view, since I learned we can’t pan away from the most recent sample without causing confusion). I do miss the click and drag to zoom feature, too. I could add back click and drag to zoom if you also hold down the shift key. I could also add a right-click context menu for the dual markers that would zoom to the dual markers. I’m sure there are other ways, too. What do you think?