Excel Template

Hello! 

I don't know if there was a question like this before if yes sorry. I have an issue with a template. I downloaded a template → "Brainstorming worksheet" https://templates.office.com/en-us/Brainstorming-worksheet-TM00000006 and I would like to add more rank numbers, not just 1-5 but I can not find where I could adjust the settings. (function or etc..) Thanks for your help.