Doctors can mark their work schedule under "Work Schedule" - the doctor can indicate the times when he is at work, the times of first aid, and when to lunch. The idea of scheduling a work schedule is for registrants to know when to register patients.

My settings → Work schedule

A person with managerial rights can use the various tools to create a work schedule for the entire clinic.

Select "Tools" in the field to indicate if you want to indicate working time, first aid time, lunch or cancel some time ("Available" option).

Then, with the left mouse button, click on the appropriate time and day of the week on the left side of the screen.
After completing the Work Schedule, click "Confirm".