1. In the left side menu, click on Visit manager.
2. In the expanded menu, click on Calendar (Collaborators).
3. Use the Filter by user just below the Calendar bar to select/deselect your collaborators so that only the calendars of those you want to manage appear.
4. Select the date from the top calendar bar and use the vertical scroll bar on the right to find the visit you want to cancel.
5. Click on the visit you wish to cancel.
6. Click on the Delete button.
IMPORTANT: You can only cancel visits in the future.