You can access it from the left-hand menu: Catalog → Booking Calendar.  

This is your main tool for visually managing room availability.

• Interface: The calendar displays bookings in a Gantt chart format — room types are listed vertically, and dates run horizontally.  
• Selecting dates: Use the date filter in the top-left corner to choose a period, then click **Apply** to update the view.  
• Booking display:
  • Blue bars: Represent paid orders. The order number is shown on the bar. 
  • Red bars: Represent manually reserved bookings.  
  • Green bars: External imported bookings (From Booking.com, AirBnb etc)

Click on any booking bar to open a pop-up window with detailed order information.