You can type into the textarea boxes, including the voynich alphabet box aswell, but use capitol letters only. Hit substitution to see letters. Use the switch feature to swap out letters as many times as you like then hit substitution. You can type a different voynich paragraph if you like, but when you type only use capitol letters. You can type in Latin in the reverse box to the left, but hit reverse to start fresh, after inputing Latin hit reverse to show voynich.