I used Cortana to set up a reminder and now I want to change the time of that reminder. The touch interface allows me to do this but how I can I do this through voice commands?
Unfortunately changing reminder time verbally is not possible at the moment.
Cortana can change your appointments on the fly. If you remember you have an appointment at 12 next day, just say “Change tomorrows appointment at 12” and then follow up to change time. BTW, Cortana can also tell you the conflicts when you are changing appointments.