Sets text elements associated with each (a,b,c) point. If a single string, the same string appears over all the data points. If an array of strings, the items are mapped in order to the the data points in (a,b,c). If trace `hoverinfo` contains a *text* flag and *hovertext* is not set, these elements will be seen in the hover labels.

Template string used for rendering the information text that appear on points. Note that this will override `textinfo`. Variables are inserted using %{variable}, for example "y: %{y}". Numbers are formatted using d3-format's syntax %{variable:d3-format}, for example "Price: %{y:$.2f}". https://github.com/d3/d3-3.x-api-reference/blob/master/Formatting.md#d3_format for details on the formatting syntax. Dates are formatted using d3-time-format's syntax %{variable|d3-time-format}, for example "Day: %{2019-01-01|%A}". https://github.com/d3/d3-time-format#locale_format for details on the date formatting syntax. Every attributes that can be specified per-point (the ones that are `arrayOk: true`) are available. variables `a`, `b`, `c` and `text`.

Sets hover text elements associated with each (a,b,c) point. If a single string, the same string appears over all the data points. If an array of strings, the items are mapped in order to the the data points in (a,b,c). To be seen, trace `hoverinfo` must contain a *text* flag.

Sets the area to fill with a solid color. Use with `fillcolor` if not *none*. scatterternary has a subset of the options available to scatter. *toself* connects the endpoints of the trace (or each segment of the trace if it has gaps) into a closed shape. *tonext* fills the space between two traces if one completely encloses the other (eg consecutive contour lines), and behaves like *toself* if there is no trace before it. *tonext* should not be used if one trace does not enclose the other.

Sets a reference between this trace's data coordinates and a ternary subplot. If *ternary* (the default value), the data refer to `layout.ternary`. If *ternary2*, the data refer to `layout.ternary2`, and so on.