After Unity 2019.3, the Display Resolution Dialog has been removed from the Player Setting. How to display this dialog box?
The official explained here and gave an example project .
Download the sample project and find that the core code consists of two files, ClosingScript.cs and PostProcessLauncherCopy.cs.
The point is, after copying these two files to your own project, you should also copy the LauncherExecutable folder to your own project before publishing, otherwise an error will be prompted.
When you run the program, a dialog box for selecting a resolution will pop up.
