...
Go to your templates list.
Click on the template name to expand details.
Click on the template name, rename, and hit ✔️ to save.
Edit a template
Go to your templates list.
Click on the template name to expand details.
Click on "Edit" to enter editing mode.
You'll see checklist representation in Markdown.
Make the changes and click "Save".
...
Go to your templates list.
Click on the template name to expand details.
See the red button "Delete" in "Danger zone".
When you click "Delete" you will be asked for confirmation.
...