Paper size

[Peleshair]

I am can't change my paper size to 11 x 17. It is not an option. Any ideas?

[Bernd Alheit]

Acrobat Reader can't change page sizes.

[AkanchhaS]

Hey there!

Would you mind confirming the application you are working on? Is it Adobe Acrobat DC or freeware Adobe Reader DC?

As shared by expert, this can not be done if you are working with freeware Adobe Reader DC.

For Acrobat,  related help link: https://helpx.adobe.com/acrobat/kb/Change-PDF-page-size-in-MAC.html 

Thanks,

Akanchha