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Remove 'trace 0' next to hover

Hi, in the hover documentation it shows how to customize a tooltip with a hover template.

The thing I am trying to figure out is why the top line (purple) has ‘trace 0’ in the hover, but the red line below does not. I would like to use a template, like the purple line, but don’t want the ‘trace 0’.

Appreciate your help!!

Hi @ssimontacchi welcome to the forum!

The <extra></extra> part of the example removes the trace name, since these tags are used to control what’s used in the second box, as explained in docstrings for hovertemplate, see for example https://plot.ly/python/reference/#scatter-hovertemplate.

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