Hi @eblitzer - Welcome to the Atlassian Community!
You often can't edit the schemes by going through the Project Settings - you need to go through the main settings.
So, got to Settings > Issues > Screen Schemes and then search for the one you want to change. You can then click edit and make your changes.
For JSM June Challenge #2, share how your non-technical teams like HR, legal, marketing, finance, and beyond started using Jira Service Management! Tell us: Did they ask to start using it or...
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