I change some projects as readonly permission and I like to let people who view tickets in those projects know of certain things about the project. The best would be a project specific banner. Is there such functionality?
Announcer for JIRA can do this. https://marketplace.atlassian.com/plugins/com.wittified.atl-announcer-jira it will also allow you to target the announcements and let people dismiss the announcements once they've seen them (and you can track them).
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