Unfortunately, there's no built-in backup of the full file. If you modified it before, there may be a backup you can restore. Check the top-left menu for the backups. If there's a file, you can open it and restore.
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Unfortunately, there's no built-in backup of the full file. If you modified it before, there may be a backup you can restore. Check the top-left menu for the backups. If there's a file, you can open it and restore.