Provide a clear visual indication of when Elevation Profile is zoomed in

[mikehgentry]

Describe the idea

The mechanics of when the Elevation Profile widget is zoomed in automatically are a bit arbitrary.

It would be nice to have a clear visual indication of when it's zoomed in. An obvious option would be to fade the graph out at either end to indicate that it continues.

https://tex.stackexchange.com/questions/680503/fade-out-of-plot-without-affecting-the-grid

I don't think you'd have to go nuts - I would guess a fairly small band would be obvious enough to anyone who knew what they were looking for.

(I suppose that would be invisible if you're at a consistent altitude at the bottom of however the graph is scaled, with 0 grade, but I would guess that situation is unusual enough for it not to matter)

Expected behaviour

...

Alternatives you've considered

You could also mark the X axis with a squiggle, seems to be well understood. Lots of other options too. I think the fading would be easier to spot at a glance than a sort of icon / glyph though.

Context

This was less of a problem before the mechanic for the Elevation Profile zooming in automatically on route generation was added, but I think this would help. It's not easy to cross-reference small numbers outside in bright light, possibly also in motion - a clear visual indicator that you aren't looking at the whole route would be very appreciated.