I'm seeing the trace button probably too close to the bottom safe area in the demo:

Question: do we need the shadow? I'm not seeing a shadow on this one from the color picker, but maybe the color picker is a bit more modal like a sheet so it grays out the BG a bit?

The "Trace" button is still butting up against the handle view; I think it could use a little padding.

When dragging the handle up or down in Apple Maps, the speed at which you drag helps dictate whether the floating panel moves to the next detent. Move a little bit slowly does not; moving a little bit quickly, does. You could base the decision to go to the next detent on the position AND velocity of the drag. I'm OK with creating another issue for this and tackling it separately.

It would be nice if we had a custom "summary" detent height (or a "minimumHeight), to allow at least a minimum height needed to display a view's "summary" information. Again, this can be a future issue.

The "Trace" button is still butting up against the handle view; I think it could use a little padding.

I've increased the height of the handle area.

...You could base the decision to go to the next detent on the position AND velocity of the drag...

Opened #132

It would be nice if we had a custom "summary" detent height (or a "minimumHeight), to allow at least a minimum height needed to display a view's "summary" information. Again, this can be a future issue.

Opened #133