README notes open automatically every time the script is opened. This is a great way of leaving yourself a reminder or leaving a note you want a collaborator to read when they open the script.
To create a README note:
- Open the Notes sidebar on the left
- Click the down arrow and select Add a README note
The note will open on the right. The title defaults to README, but you can change it.
See also:
How Do I Make An Existing Note a README Note?