Garmin Edge 305 Question
 

I love my edge 305 except for one thing. Is it possible to adjust the y-axis (elevation) on the profile page of a ride or a course (the page that shows a graph of the elevation vs distance)? I can adjust the x-axis (distance) with the two arrow buttons, but the y-axis is fixed and never seems at the right scale (always too zoomed-out). Any help would be appreciated!