I use some apps on the 4k display and the UI scales fine. Explorer by itself as well. But the "Open" and "Save" etc. dialogues get scaled to 100% instead of 150% which is the system setting.

Now I would like to open these dialogues on another screen which is HD and has no scaling problems. But no matter what I try, I can't get them moved to the other display. I tried window class as well as window titles. I can't select application because it is neither an explorer window nor part of the app.

Any way to achieve this?

I thought I had it solved for now by overriding the DPI-Settings for the apps in question, because I found, that the dialogue window derives from the app settings and not from the system settings. But then in the app some functions like the colorpicker don't work so this is still an issue.

I found that in general windows that open as a subordinate dialogue called by an app are not easily targeted by DF.

In the screenshot you see the size-difference if the open-window is scaled to 100%

Thanks, that was it And with the class I get all of those windows whether open or save (as) etc. opened by any app...

Now I really miss the child windows opening over the main app windows.

Is there any way to achieve both?

It seems the "center child windows" function in window management is triggered in a way absolutely overriding any other window placement. I wish there was a way to attach conditions to that as well or stack the functions in priority order.