Where could I input the "ReCaptcha Key" and set Captcha to ReCaptcha.

Could anyone tell me where can I input the "ReCaptcha Key" and set Captcha to ReCaptcha.

I remember there are a pull down menu for selecting "ReCaptcha" or "Captcha" somewhere in the admin area.

but now I can't find it.

reCaptcha isn't integrated into Dolphin. You might be thinking of this: http://www.boonex.com/m/captcha-2

Also, please don't create duplicate topics.