Assign a temporary custom media size
A temporary custom size can be assigned to a
media. You do not have to select any of the pre-defined sizes that are
applied when a media catalog entry is assigned to the job. When you assign a
custom size to a media, you do not have to create a new entry for the custom
size in the Size Catalog. A temporary custom size is useful when you have a
single/limited use of a particular media size.