Is there a way to change the default Latex font? Currently, the latex labels are printed in serif, but it would be nice to have consistent sans-serif fonts in the entire figure. Or is there a way to use subscripts and greek letters without latex?
The plotly cloud doesn’t support custom LaTeX.
You could potential add your custom LaTeX with MathJax in plotly.js
For more info about text formatting: http://help.plot.ly/adding-HTML-and-links-to-charts/