I noticed this strange behavior with the annotated timeline.

When the data density increases above a certain level the dates
disappear completely underneath the graph. I know there is a lot of
logic that determines how many dates to show depending on how big the
graph is and how many dates are currently visible, but when the
density gets above a certain level it displays nothing.  I think this
is about 1 date per 2 pixels.

For example, create a data source with 1000 points. (For example,
rainfall over the last 3 years).  If you plot this on a graph that is
2000 pixels wide you don't get any date indicators. You have to zoom
in for this to happen.  I think, with 2000 pixels, there should be
enough room to show something.

Does anyone have a fix or workaround? (Besides multiple data sources,
which is a very involved fix for a seemingly small problem)

I have confirmed this with 250 data points and a graph that is 500
pixels wide. Again, I feel this is large enough to display some date
indicators under the graph.

In general, I feel that the annotated timeline should show more dates
underneath the graph under certain high data conditions.
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