It may be easier to show the expected behaviour with a video: https://www.youtube.com/watch?v=vgGnPTgQqjo
The important thing is that text visual size and window visual size is kept in sync as the system DPI changes. From the report I got the impression that this was maybe not the case - but that could be a misunderstanding. From there it's possible to go into the details: there are multiple coordinate systems, window and text sizes are (approximately) constant in one coordinate system but changes in another. Long discussions can be had :) But fortunately, Qt apps can for the most part ignore this and continue to assume a single coordinate system at 96DPI. - Morten > On 9 Feb 2021, at 18:17, Friedemann Kleint <friedemann.kle...@qt.io> wrote: > > Hi, > > it seems there is a misunderstanding here: Qt High DPI scaling preserves the > point-size of the fonts; they are sized according to the system metrics. > > All it does is pretend a lower resolution to the application so that apps > written for 96DPI continue to work. > > It is not a means of zooming the application (as opposed to QT_SCALE_FACTOR ). > > Regards, Friedemann > > -- > > Friedemann Kleint > The Qt Company GmbH > > _______________________________________________ > Development mailing list > Development@qt-project.org > https://lists.qt-project.org/listinfo/development _______________________________________________ Development mailing list Development@qt-project.org https://lists.qt-project.org/listinfo/development