Markdown Mode for Jira lets you write Markdown, check a preview, and save formatted content into Jira. Before you start, ask a Jira site administrator to install the app from the Atlassian Marketplace. You need permission to edit the issue. On an existing Jira Cloud issue, open the Actions menu and choose Edit in Markdown. This opens the description editor. Start with a test issue. Paste the example from the guide, or append it below existing text. Split view shows your source beside the formatted preview. Check the heading, list, and code block. The preview helps you catch formatting problems before saving. AI generated Markdown still needs review. Choose Save description. In Jira, this writes native issue content. This walkthrough uses fictional data in the local demo. To add a comment, use Actions, Comment in Markdown. Write, preview, then choose Add comment. Keep this separate from editing the description. Open your issue again to check the saved formatting. If anything blocks you, use the guide’s support link.