Before you start

You must be the administrator of your JIRA instance in order to install JQL Enhancer app. 

JQL Enhancer is available only in JIRA Cloud. 

Installing JQL Enhancer

To install JQL Enhancer app, select setting from your homepage of Jira then go with Add-ons.

After clicking Find new add-ons button, just write JQL Enhancer in the search space.