The fields of an appointment information look like the ones in the following screenshot.
If a patient is in the database, the patient's information can be searched by a key word. The patient information cannot be edited on the appointment window when making an appointment.
If a patient is a new one, the patient's information about him / her can be created and added into the database either when making the appointment or when creating new record later on the appointment.
The default start time of a visit is the next quater from the current time
The unit of the time length of visit is 15 minutes. the default length is 30 minutes.
The time overlap of appointment can only be checked after it is assigned to a staff.