I guess this example shows how to break tooltips in multiple lines.
I have the same issue with labels on category axis, can these be easily broken in multiple rows ? It would be great to be able to show html span elements there but they are encapsulated in <text> SVG elements, what can be done ?
The “categoryAxis” is the old name of the “xAxis“.
In the example above it is demonstrated exactly this how to set labels with text on multiple lines.
The formatFunction callback is suitable for this purpose.