follow this link with detail information
works on the Edge 510, Edge 520, Edge 800, Edge 810, Edge 1000
Navigate to the Garmin folder on the unit (your exact drive letter will vary), and within it you’ll find the ‘startup.txt’
click here to download the startup.txt file to modify and replace your original file
double click the startup.txt and replace your info inside, save it and replace them
works on the Edge 510, Edge 520, Edge 800, Edge 810, Edge 1000
Navigate to the Garmin folder on the unit (your exact drive letter will vary), and within it you’ll find the ‘startup.txt’
click here to download the startup.txt file to modify and replace your original file
double click the startup.txt and replace your info inside, save it and replace them