Unfortunately you cannot do that at this time. They will appear in the order created I believe.
Reach out to Atlassian Support. But you might check jira.atlassian.com first to see if there is already a suggestion.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.