A:AnswerI have an Android 5G phone on T-Mobile.
Install the Canon Print Service App. Then use the share icon to share what you want printed to the Canon Print Service.
Not sure about iPhone.
A:AnswerCanon has some software "canon easy-photoprint editor" that has many options and one is create your own size and I think that would do the trick.
A:Answercanon has their website for ALL information about the right products to use with their equipment. For this printer: CANON PG-260 OR 260 XL & CANON CL-261 OR 261XL