luthier

I am experiencing the same issue. Inserting the following line after the application.initialidid help the resolution issue, but TPaintBox causes rendering problem not only the TPaintBox component itself but it affects to the entire form. I don't know if TPaintBox is really the key or not, but forms without TPaintBox seem working fine. Please let me know if you know how to fix this. begin Application.Initialize; GlobalUseMetal := true; // <-- Inserted this line. Application.CreateForm(TfrmLeat, frmLeat); By the way, it sounds like the original application (without GlobalUseMetal) works no problem with an external monitor.