How to add capcha for node/edit form I need to add captcha for node edit form, not for the front-end form. please can any one help me?
I believe you are  using Captcha module..


Go to admin/config/people/captcha
Enable "Add CAPTCHA administration links to forms" and "Allow CAPTCHAs and CAPTCHA administration links on administrative pages"





Go to node edit page you see setting like below





Enable captcha for form