Emails

  • After the local part, pressing @ suggests common domains;
  • Bind a full address to a custom phrase such as mail;
  • Use half-width @ and dots.

URLs

  1. In Chinese mode punctuation sneaks in, so switch to English mode;
  2. Typing www suggests common domains;
  3. Always use half-width characters for code and commands.

Settings

Enable URL and email completion plus automatic half-width in English contexts under Settings → Advanced.