My screen if gigantic, numbers and letters are huge can't even enter my 4 digit pin, how do I make it small again?

[iMore Question]

My screen if gigantic Numbers and letters are huge Cant even enter my 4 digit pin

My phone screen on I Phone 5 suddenly changed to very large numbers I cant enter anything

 

[Reparkable]

Re: My screen if gigantic Numbers and letters are huge Cant even enter my 4 digit pin

Why not?

 

[moloes]

Re: My screen if gigantic Numbers and letters are huge Cant even enter my 4 digit pin

Hold down the home button and power button together until the  logo appears.