Unable to apply generated custom power mod.
https://www8.garmin.com/manuals/webhelp/GUID-2A58ED2A-14A3-4161-ADB5-259E1781AF1B/EN-US/GUID-A98507AE-C8FE-4CE7-A441-417DEAC99C65.html
6. "If necessary, select Done to save and use the custom power mode."
Done option does not appear