mobile game in unreal engine 4

hey, i want to make the resolution of the game 720p in unreal engine 4? so the size of the game go lower, please i really need help i seareched everywhere

Reducing the overall resolution of the game doesn’t reduce the size of the game. If you want to reduce the game size, I would suggest reading through the following docs page :

If you still want to adjust the Screen Resolution, you can do that like so :

I haven’t tested if this works on mobile. This might not work since I believe mobile platforms have are a bit restrictive on what resolutions you can have. But still worth a try.