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Since updating to Delphi 10.4 I am finding that the hints appearing in TVirtualStringTree are not properly scaled on my Hi-Res monitor appear at least twice the height they should be. The problem does not extend to the rest of the application as I am using TMS THTMLHint but TVirtualStringTree doesn't recognise this control and uses the standard windows Hint.

I suspect it is due to a change made in 10.4 to address this Size of hints in Delphi 10.3 Rio issue.

Has anyone else had this issue with 10.4?

John Barrat
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It seems that Embarcadero fixed a long broken dpi scaling of the Hint window in RAD Studio 10.4:

https://quality.embarcadero.com/browse/RSP-24541

I guess this change is responsible for the wrong hint font size of Virtual Treeview in Delphi 10.4. Please open an issue in the issue tracker respecting the guidelines for submitting bugs.

Joachim Marder
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  • It seems to work as expected on a new form in 10.4 so I will have to investigate further before submitting an issue. – John Barrat Aug 28 '20 at 11:15