If you'd like to run Magma Studio in full screen on your iPad, you will have to add it as a shortcut on your Home page. In order to do that:
Open Magma Studio in Safari
Click "Share" icon in the top bar and select "Add to Home Screen"
Click "Add" to confirm
Go to your Home screen and click "Magma Studio" icon
That's it! Magma Studio should be now running in the full screen.