In one of my project, a bit of resolution seems to be lost when scaling (150%). It is plotting a complicated graph for signal processing. We are thinking whether we can just plot the graph according to the scaling factor (e.g. running the math calculation ourslef and generate a graph double the size for high resolution etc) and not to scale this part of the widget by using the high dpi setting.

@jsulm Looks like that is the only way to get the scaled widget correctly. Thanks!

@SGaist I tried the Qt 5.12.6 and it did the trick! Thanks.

But interestingly, the title of the main application is no longer scaled by "Make text bigger" setting but the dockwidget ones does. I guess that there is an intention not to scale the main title. "Make everything bigger" setting does scale everything properly now except the titlebar height of only the main application looks not enough for the enlarged font size. I will give qt5.14 a try as well.