How to add a picture to photo board?

[StarryACNL]

Hi
I have just payed off a photo board and I have found a qr code which I really want to use on it.
How do I add this picture to the board?

 

[Eirrinn]

go up to it and press A

 

[StarryACNL]

go up to it and press A

Ok-I didn't know it was that simple!
Thanks