In my unity2d project i added some gui buttons and arrange their position to corners while checking on 'game' window. But when i install my game on my phone, buttons changes position and appear on center of screen instead of corners.How can i solve this? If needed i can upload some ss.
You should change type of UIScaleMode
to Scale With Screen Size
in Canvas Scaler
component. And then, change pivot of your buttons (if a button on the left bottom part of a screen, then pick LeftBottom and so on).