Xelatex

• How to Define a LaTeX Command in Org Mode
  Define a LaTeX macro with #+LATEX_HEADER in Org files, and add it to the preview preamble separately when inline previews need it.
• How to Fix “Extended mathchar used as mathchar” with \bm
  The error usually means the legacy bm package conflicts with unicode-math. Remove bm and use unicode-math commands such as \symbfit.
• Why Are Vector Images Rasterized in XeLaTeX PDFs?
  Keep figures sharp in XeLaTeX by including vector PDFs, converting SVG or EPS appropriately, and checking whether the final PDF contains bitmap images.