According to the documentation, "For the math, shake and sheep CAPTCHAs you can also set difficulty level
resulting in more sheep to find, longer shake times and harder
equations.".
I assume that the same goes for the more advanced (QR, NFC...) captchas.
I've been searching for that button for at least half an hour now. Has it been accidentally removed from the App?
Also, is there a way to test the capture without going through the whole "create new alarm -> set captcha -> set alarm time to be next minute -> wait a minute for the alarm to go off -> solve captcha" procedure, which can be rather tedious and messes up your sleep stats?