Canon mp280 series On-Screen Manual page 219

Important
The layouts of all pages are changed to the selected layout.
All images that do not fit in the new layout will be collected on the last page.
Note
The layouts that can be selected may vary depending on the Paper Size and Orientation.
Layout Print
Important
If the new layout has a different number of frames per page from the current layout, the following will
happen:
If the number of layout
frames is increased
If the number of layout
frames is decreased
Note
The layouts that can be selected may vary depending on the Paper Size and Orientation.
Select the Apply to all pages checkbox to change the layouts of all pages to the one you newly
selected.
: Images will move from the subsequent pages to fill all the frames
in the new layout.
:
Pages with the new layout will be added until all the images on the
pages with the current layout can be fitted.