Be sure to test that all your applications display correctly after changing DPI.
I've seen buttons and text disappear when changing the DPI to anything over 100%. This was on a .net based application.
The feedback from the application provider is that they only support 100% DPI.
With the user having a 1920 x 1080 native screen on their new laptop with 15.6" screen and with them not having the best eyesight, the only option available to us has been to furnish them with a 23" widescreen.
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