Holes and Digits - SafetyFlux/captchalogue GitHub Wiki

As previously stated, the holes on a card can be toggled, which updates the code accordingly. Alternatively, a single square with a character can be clicked, then a new character typed. Changing the code updates the holes, and vice versa. If the new character isn't compatible with a captcha card (e.g. not 0-9, A-Z, a-z, ?, or !), an error message will pop up and nothing will be changed. Every set of six holes corresponds to one digit of the code, like this:

If you forget, you can toggle the grids, which provide numbers for each section of holes.