Include or draw fonts in PDF files

Hello TeXmacs users,

I often use the nice "draw-over" feature to superimpose mathematical labels onto figure in PDF format. When exporting to LaTeX, TeXmacs cleverly exports a PDF version of the figures that includes the labels. However, the fonts for the labels are not embedded and the journal editor complains that they do not draw correctly in their system.

Does anyone have a recommendation for instructing TeXmacs to draw the fonts as paths or embed them, or for an external command-line tool that could embed (or draw) the missing fonts?

Thanks in advance for your suggestions,
Basile.