The Filter is an element on the Bookings Page that will allow you to control what is displayed within the calendar.
If you need more information on the page itself please review this article.
By expanding the Filter drop-down you will be able to limit the data that is displayed.
Visit this article for more info on the filter parameters.
To edit a booking or a blackout date, simply hover over the item in the calendar view.
While hovering over an item a pop-up will appear that provides its information. To edit the item click on it and you will be directed to the corresponding screen to make changes.
For more on how to edit bookings review this article.
You can find more info about blackout dates in this article.