Making phaser game stay the same size

[kyrv19]

Hey,

I was wondering how to disable zooming on my game on mobile, because it zooms in and there is no way to zoom out. I use 
   Game.scale.scaleMode = Phaser.ScaleManager.SHOW_ALL; 

 

or alternatively how to allow player to zoom out of the game, to make it again full screen (on mobile)