Every time you create a new numbering pattern in serials you can save it for later use. These patterns are accessible via the Manage numbering patterns page.
This page will list for you the numbering patterns you have saved in the past as well as a few canned patterns.
It will also allow you to create a new numbering pattern without first adding a subscription. To add a new pattern click 'New numbering pattern' at the top of the list of patterns.
See the full documentation for Serial Numbering Patterns in the manual (online).
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