This Garmin web page
https://www8.garmin.com/manuals/webhelp/edge830/EN-US/GUID-DB0BC20A-DADF-41EB-A61C-14BEC158B43C.html
states that wheel circumference can be entered manually in sensor settings.
Where exactly can I enter my wheel circumference in Edge 830? I don't see anything related to manual entry of wheel size in my sensor settings.