It would be good if you could select the employees whose times you want to view in the calendar. A pre-selected set may not always work for, for example, cosmetologists and hairdressers. Because there are also makeup times with both. And diagonals with a few cosmetologists. Or when viewing sugaring, cosmetologists and one hairdresser are needed. The easiest way would be to click on the author to decide whose views are on the calendar. When you have a lot of employees, the view is really tight and it is difficult to perceive the time.