It’s not clear: are you trying to style the text for a plot title (which is always “outside” the central plot frame) or for some kind of label or text glyph (which is always “inside” the central plot frame)?
Regardless:
- multi-line titles are not currently supported (but you can add multiple
Title
annotations that stack) - No “markup” is supported for styling in either case. For
text
orLabel
(orLabelSet
) you could style individual words separately.