My Iphone G3 shows only largest graphic display

[accangio]

I have my iphone G3S since August 30th on the third day suddenly while listening to songs from the ipod function the display appeared in lagest poosible enlargement. The normal 2 finger possibility to reduce size does not work anymore. Is this a bug? In this situation it is not possible to use the phone because dialing shows only a part of the numbers. Even logging on for sim or code is enormous difficult. Using text functions like internet or email is totally impossible Does anyone know this problem? Is there a reset funktion for the iphone. My phone is a official german t-mobile version.
Thanks for your help.
Best greetings from Capri Italy

 

[Leanna Lofte]

I think you might have accessibility turned on. Try double tapping with 3 fingers to zoom out. Then go to Settings > General > Accessibility > Zoom to turn it off.

 

[accangio]

Thanks a lot this helped.
I do have no idea why I switched this on what's it for ?

But anyhow thank you very much for your advice.

Peter