- Go to Listings -> Active Listings
- Click the "pencil and tag" icon under the view column.
- Clicking this icon will open the eBay listing editor.
The areas that can be edited for an active listing are the listing title, fixed price, and the description.
There is a checkbox to "Send Update on Save" that will update the listing with the changes that were made when you click save and the eBay listing editor window closes.