The best way is to go to the Main Menu screen. Click “Add new patient” and  then insert all the patients details (Name, address etc). Then click on Diary and you can click on “2” next to the time which you want to book them in for.

OR

Insert their details into the boxes in the top right corner of the diary screen and then click “Add”. Then click “2” next to the time which you want to book the patient in for.