Garmin 540: How do i change the water bottle settings from 750ml to 650 ml? I have gone to the Nutrition/Hydration widget and I see water bottle. The current water bottle setting is 750. There is a keypad with numbers but when I try to enter or delete any numbers it goes back to 750. From the 750 screen, if I click the 6, the screen becomes 7506. Any help would be appreciated.