Quote Originally Posted by Uwe View Post
A paper size of 300*200 mm with a resolution of 150dpi means an QImage size of 1772x1181 pixels. When you press 100% in your image viewer you should have text labels in a comparable size to those on screen, otherwise your image viewer will scale the image.
Yes, that is exactly what I expect from the function. But the exported picture clearly shows much too small axes and labels.
This is the image I already attached:

bode.jpg

I created it using the bode example with the modified hard-coded resolution (set to 150 dpi). It is clearly visible that the axes are much smaller than they are on the screen.

I expected that a higher resolution would result in a picture consisting of more pixels (e.g. for publication quality), but with the same relative dimensions of the plot elements. Meaning that the axis labels stay readable even at high resolutions.

But if I set the resolution in the bode example to 600 dpi and display the whole image in my image viewer, the labels are so tiny that they are illegible.

Please bear with me if I totally misunderstood the parameters.