On the website, I read that "drag and drop" functionality is present in the playlist builder and in the program calendar. I have tested this in the demo site. Here are my conclusions:

1) Playlist builder: Indeed, the playlist builder has full drag and drop functionality. Using it is very user friendly.

2) Program calendar: Here, the drag and drop functionality was more limited than I expected. Let me explain:
a) Yes, I can *move* a show from one time slot to another, using drag and drop.
b) But sometimes I want to *copy* (duplicate) a show from one time slot to another. I could not do this.
c) The most important task is adding a show to the calendar. This is very cumbersome:
- Specifying the date and time of a show happens independent from the calendar that is displayed on the right. I can not click on a slot in the calendar to insert a show at that specific date and time.

3) Adding content to a show: Full drag and drop functionality.

So, while drag and drop functionality is available in the creation of the basic building block (playlists and shows), the calendar seems to lack a more intuitive way of scheduling shows.

Also, for a novice with no prior experience in Airtime, it would be interesting to see an explanation of the abstract data model of the whole system. E.g. Calendar -> Show -> Show Instance -> Playlist -> Audio fragment. These terms are used but I didn't find a formal definition of these terms and the relationships between them.

When thinking this over, I wonder why I can't simply drag a playlist to a timeslot in the calendar...