Pdftex

• How to Increase the TeX Input Buffer for pdfLaTeX or LuaLaTeX
  Increase pdfLaTeX or LuaLaTeX's input-line buffer by setting buf_size in an active texmf.cnf, then verify the change and rebuild formats if needed.
• How to Align an Inkscape PDF+LaTeX Overlay in LaTeX
  Use Inkscape’s generated .pdf_tex as the main figure when possible; for a separate overlay, match page bounds and width, then align both boxes.