Captcha

The Captcha chip marks where the captchas from Settings → Spam go in a form. Without it, they go before the send button.

[[message]]
[[captcha]]
<p class="actions">[[submit]]</p>

It shows in the More menu once a captcha’s keys are saved, and goes from the menu once placed. It has nothing to set up: click it and nothing opens. Drag it to move it; double-click it to remove it.

Which captchas run, and on which forms, is set in Settings → Spam and in the form’s Advanced tab. See Spam protection.