Go to Notices, and in the Action column, click on the three dots and select Edit
You will end just here :
2 buttons on the left :
Archive: If you don't need your notice anymore you can archive it. By doing so it will not be on your Notice list anymore.
Save: Saving all your modifications.
From the Rollback section [ Premium Plan / mobile notice only ], you can choose to go back to a previous notice version.
From the Advanced settings section, note that by default, for any modifications of a consent notice or of its source, the modified notice will only be displayed to new visitors and the notice won't be displayed to previous visitors. If you prefer this last option, you can change the Notice display mode.