To edit an existing line in your project:
Start from the Lines section of your project (If you have more than one project, check that you're in the right one)
1. Scroll down to the list of lines under the map, and select the line you wish to edit.
2. Click on the “Edit” button above the map
3. Here you can edit the line name, type, colour and location.
4. When you are done, click the green “Save” button at the bottom of the page.