How to change the page size of Backlog in Agile Board to show more than 50 Stories

You can change the 50 story page size configuration in the "BacklogMetaDataService" Script Include.

Note that this is a customization not officially supported by ServiceNow.

That being said, to change this follow the steps below.

NEXT STEPS:

1. Navigate to System Definition > Script Includes
2. In the "Name" column search for "BacklogMetaDataService" and go to the record
3. Look for the following line:

backlogPageSize: 50,

4. Change the line to the following (or any number you choose):

backlogPageSize: 100,

5. Save the form