For text and equation in figures I want to use the Helvetica font. Unfortunately the greek symbols from Helvetica are not really suitable. A number of publishers recommend to combine Helvetica with the greek symbols from the Symbol.ttf
font.
\documentclass{article}
\usepackage{fontspec}
\usepackage{unicode-math}
\setmainfont{Helvetica World}
\setmathfont[range=\mathit]{Helvetica World}
% this does not work:
%\setmathfont[use greek letters from]{Symbol}
\begin{document}
Some text and an equation: $\alpha + \beta = QR$.
\end{document}
I played around with \DeclareMathSymbol
but that conflicted with unicode-math.
Is there any way to follow this recommendation of combining these two fonts in (Lua-)LaTeX?
\setmathfont
should have an opentype math table which sets many math related parameters. latin modern math, xits math, cambria math have this table for example.