Yes. The roadmap Description field supports Markdown, an easy-to-use formatting syntax that converts plain text to HTML. You can use Markdown to create headings, bold and italicize text, add bulleted and numbered lists, and much more.
When you create a new item, the Description field is pre-populated with example Markdown that you can replace with your own words in the item card. You can also edit an existing item's description in the item card by clicking the Items field in the Items Table (see View and edit item details).
You can get help on basic Markdown formatting by clicking the ... icon below the Description field in the item card. For help on the complete Markdown syntax, go to the Markdown website.