Perhaps the size of paper or page you want to use is not included on a button.
In this case you will need to create a custom paper size.
You can create paper up to any size, but you will not be able to print a page larger than your printer can handle.
To create a custom paper size:
Select None in the Paper dialogue box.
Enter the height and width of the paper in millimetres in the appropriate boxes. You can either type directly into the boxes or click on the arrows to increase or decrease the amount shown in each.
Enter the top, bottom, right and left margins needed to ensure that you do not try to print on an area larger than your printer can cope with.
Click on the OK button. Your document will appear laid out on the paper size you have defined.