It's not directly possible in the greenhopper detail view. You first have to open the issue in the normal JIRA issue detail view through clicking on the issue key in the greenhopper detail view. In the normal JIRA view you should see a trash can icon if you hover over an attachment. If not, you should check your permissions as mentioned in the answers from Timothy and Matt.
Over the next several weeks we'll be sharing some of our Getting Started guides here in the community. Throughout this series of posts, we'd love to hear from customers and non-customers ab...
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