在打包完成之后，点击exe文件，默认是全屏，按下F11，会缩小化。此时会出现一个文件夹save文件夹
里面会生成一个配置文件
[ScalabilityGroups]
sg.ResolutionQuality=100.000000
sg.ViewDistanceQuality=3
sg.AntiAliasingQuality=3
sg.ShadowQuality=3
sg.PostProcessQuality=3
sg.TextureQuality=3
sg.EffectsQuality=3
sg.FoliageQuality=3
sg.ShadingQuality=3
[/Script/Engine.GameUserSettings]
bUseVSync=False
bUseDynamicResolution=False
ResolutionSizeX=1600
ResolutionSizeY=900
LastUserConfirmedResolutionSizeX=1600
LastUserConfirmedResolutionSizeY=900
WindowPosX=-1
WindowPosY=-1
FullscreenMode=2
LastConfirmedFullscreenMode=2
PreferredFullscreenMode=1
Version=5
AudioQualityLevel=0
LastConfirmedAudioQualityLevel=0
FrameRateLimit=0.000000
DesiredScreenWidth=1280
bUseDesiredScreenHeight=False
DesiredScreenHeight=720
LastUserConfirmedDesiredScreenWidth=1280
LastUserConfirmedDesiredScreenHeight=720
LastRecommendedScreenWidth=-1.000000
LastRecommendedScreenHeight=-1.000000
LastCPUBenchmarkResult=-1.000000
LastGPUBenchmarkResult=-1.000000
LastGPUBenchmarkMultiplier=1.000000
bUseHDRDisplayOutput=False
HDRDisplayOutputNits=1000
[ShaderPipelineCache.CacheFile]
LastOpened=UDPTest
修改FullscreenMode = 0;即可全屏。