anchor.diff:  
   . Load your theme when running Asciidoctor PDF:
   
  - $ asciidoctor-pdf -a scripts=cjk -a pdf-theme=./jp-theme.yml -a pdf-fontsdir=`ruby -r asciidoctor-pdf-cjk-kai_gen_gothic -e "print File.expand_path '../fonts', (Gem.datadir 'asciidoctor-pdf-cjk-kai_gen_gothic')"` document.adoc
  + $ asciidoctor-pdf -a scripts=cjk -a pdf-theme=./cjk-theme.yml -a pdf-fontsdir=GEM_FONTS_DIR,`ruby -r asciidoctor-pdf-cjk-kai_gen_gothic -e "print File.expand_path '../fonts', (Gem.datadir 'asciidoctor-pdf-cjk-kai_gen_gothic')"` document.adoc
   
   The `-a pdf-fontsdir` option is important to tell Asciidoctor PDF where to find your custom fonts.
  +(Note that the inclusion of GEM_FONTS_DIR in the value is only required when using Asciidoctor PDF 1.5).
   
   Rather than using the installer from the `asciidoctor-pdf-cjk-kai_gen_gothic` gem, you can download fonts whatever way you choose.
   When using your own fonts, be sure to consult the <<docs/theming-guide.adoc#preparing-a-custom-font,Preparing a Custom Font>> section of the theming guide to find recommended modifications.
  
positive.code: (For KDP, `-a optimize` works best.
  For GitLab repository preview, either `-a optimize` or `hexapdf optimize` will do the trick.)
  
  === Enable stream compression
  
  The simplest way to reduce the size of the PDF file is to enable stream compression (using the FlateDecode method).
  You can enable this feature by setting the `compress` attribute on the document:
  
negative.code: 
   $ asciidoctor-pdf-cjk-kai_gen_gothic-install
  
  . Create a theme file named [.path]_cjk-theme.yml_ that extends the default theme to override the fonts:
  +
  [source,yml]
  ----
  extends: default
  font:
    catalog:
      merge: true
      KaiGen Gothic CN:
        normal: KaiGenGothicCN-Regular.ttf
        bold: KaiGenGothicCN-Bold.ttf
        italic: KaiGenGothicCN-Regular-Italic.ttf
        bold_italic: KaiGenGothicCN-Bold-Italic.ttf
    fallbacks:
    - KaiGen Gothic CN
  base:
    font-family: KaiGen Gothic CN
  heading:
    font-family: $base-font-family
  abstract:
  