UE4 how to package full screen display and a fixed resolution?

UE4 how to package full screen? I can not find this setting…
When I packaged, UE4 is windowed, click on the window will be maximized UE4 adaptive screen resolution, I think fixed UE4 resolution, how to do?

Have a look at the first answer to this question: https://answers.unrealengine.com/questions/91257/packaging-resolutionfull-screen.html

Hello,

Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes. If you are still experiencing the issue you reported in the current engine version, then please respond to this message with additional information and we will investigate as soon as possible. If you are experiencing a similar, but different issue at this time, could you please submit a new report for it.

Thanks!