This is possible in many cases for both photo calendars and coffee table books.
Photo calendars: During design, select the "Options" tab on the right-hand side. In the window that opens, you can change the paper type and the color of the ring binding as well as the format. Please note that depending on the selected layout and the type of paper, not all formats can be selected.
Illustrated books that are designed directly in the browser: Select the "Book Options" tab in the upper area.
Illustrated books that are designed via download software: Here, only a subsequent change of the format between Exhibition A4 landscape and Portfolio A3 landscape, or between Exhibition A4 portrait and Portfolio A3 portrait is possible.
In all cases, please be sure to check the layout of each page of your illustrated book or photo calendar after changing the format.
