How to use

For all captchas:

  [Esc] key acts like the "Skip" button.

  [Ctrl] + [+]/[-] changes the scale for the current captcha.
  You can specify the default value for new captchas in the settings.

For text captchas only:

  [Enter] key acts like the "Send" button.
  [Ctrl] + [Enter] key acts like the "Send, then Stop" button.

For mouse captchas only:

  [Ctrl] + click acts like clicking the captcha, then the "Stop" button.