When did you lodge the feature request? Thanks
ColinDooradoyle - it does autoscale but how it does it is a bit of a mystery - my last run had elevation from 77M to about 130 and the Graph scale showed me from -50 up to 300 on the full screen page and 0 to 200 on the summary page so I'm not sure how it decides but a manual setting would be really nice.
I agree fully to this. There are posts going back 7 years here and nothing has been done about it. I train in an area that is mainly flat - highest point about 40m but on Garmins scale I can't see any much up and down at all as it only really shows in increments on 50m and nothing much in-between
Looking at the with when running this it seemed to range from 15m to 35m but that can't really be seen here. the Y axis should be possible to drag out
There are posts going back 7 years here and nothing has been done about it.
Posts on the user forum won't have much effect on the development plans of Garmin. When requesting a feature, use rather the right tool designed for exactly that purpose: https://www.garmin.com/forms/ideas/
Alternatively, you can do like I did too, and turn on the Y-scaling by selection, yourself with the help of GCOverrides: