You can define custom sizes for your posters and postcards.
To define a custom paper size:
tab.
button to add a new paper size.
The default templates shipped with Posterino use standard paper sizes named 'Poster', 'Letter' or 'Postcard'. You can change these paper sizes too.
For example, in general you would like a "Poster" to be 18" x 24" instead of the 20" x 30" Posterino sets as default. No problem, find the paper size named "Poster" and change the definition. The next time you create a poster it will be sized to 18" x 24".
To change the size or resolution of an existing document, choose from the menu.
from the menu will work as well