To make special tokens like &self, &space, etc. stand out with a custom color and bold font in VS Code, add the following to your settings.json:

"editor.tokenColorCustomizations": {
  "textMateRules": [
    {
      "scope": "constant.language.special-token.metta",
      "settings": {
        "foreground": "#FF00FF",
        "fontStyle": "bold"
      }
    },
    {
      "scope": "variable.other.constant.metta",
      "settings": {
        "foreground": "#FF8800",
        "fontStyle": "bold"
      }
    }
  ]
}

You can change the colors as you like. VS Code does not support "extrabold" font weight, but "bold" is the strongest available.

You can author your README using Visual Studio Code. Here are some useful editor keyboard shortcuts:

• Split the editor (Cmd+\ on macOS or Ctrl+\ on Windows and Linux).
• Toggle preview (Shift+Cmd+V on macOS or Shift+Ctrl+V on Windows and Linux).
• Press Ctrl+Space (Windows, Linux, macOS) to see a list of Markdown snippets.

• Visual Studio Code's Markdown Support
• Markdown Syntax Reference

Enjoy!