What is the difference between 3×3 photo paper and 4×6 photo paper

4×6" photo paper has a print area of 4 × 6 inches. When a 4×6" paper tray is inserted, the paper size on the home screen shows 6".

3×3" photo paper has a print area of 3 × 3 inches. When a 3×3" paper tray is inserted, the paper size on the home screen shows 3".

In Photo Print, frames can't be added on 3×3" photo paper because its print area is fixed. The Frames&Adjust button shows Adjust only.

In Photo collage, Posters are not available on 3×3" photo paper, and the collage templates differ from those for 4×6" paper.