9. When Page Setup is open, click on the down arrow for Custom Paper Size.
NOTE: When creating the custom page size, divide the banner size by a value that will make it less than the printer maximum custom page size (90.5 inches). In this example we take (180/2 = 90), therefore the custom page size created would be 20x90 (inches).
10.Click on New, name the custom size (i.e. 20 x 180 in this example), under Paper Size type in 20 inches for the width and 90 inches for the height, margins should be set to zero (0). Click on Save. Click on the down arrow again in the Custom Paper Size and select Page Attributes.
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