This is controlled by a workflow property in the Closed workflow step.
The workflow property Jobin mentions will solve the "cannot be edited". It's standard in the Jira default workflow, so have a look there if you're not sure.
The ability to reopen is up to your workflow as well - you can add/remove the transitions out of "closed" or apply conditions to them to prevent/allow users using them.
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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