Hello.
1) the description about most of features available in the Overview plugin page and: https://wpbookingcalendar.com/overview/
also description about configuration of most features available in live video guides here https://wpbookingcalendar.com/help/
2) Please note, the live demos of paid versions of Booking Calendar its public live demos, and any other user can test it and change the settings. So may be during your tests, some other visitor can make some chnages in settings, that can affect to you.
Each demos reset each 3 hours.
In the live demo of Booking Calendar Business Small version, which is configured by default for making the bookings for specific timeslots, when you select the date in calendar, then in drop down list (which defined as “wide list of timeslots”), all booked time-slots for selected date become unavailable (grayed) for selection. Even more, when you mouse over specific date, you will see in mouse over tooltip all booked timeslots for specific date.
And “wide list of timeslots” possible to show as standard dropdown list in booking form. Is easyly to configure at the Booking > Settings > Form page by using shortcode generator (helper) at the right side of the page.
You just need to replace this:
[select rangetime multiple "10:00 AM - 12:00 PM@@10:00 - 12:00" "12:00 PM - 02:00 PM@@12:00 - 14:00" "02:00 PM - 04:00 PM@@14:00 - 16:00" "04:00 PM - 06:00 PM@@16:00 - 18:00" "06:00 PM - 08:00 PM@@18:00 - 20:00"]
to this:
[select rangetime "10:00 AM - 12:00 PM@@10:00 - 12:00" "12:00 PM - 02:00 PM@@12:00 - 14:00" "02:00 PM - 04:00 PM@@14:00 - 16:00" "04:00 PM - 06:00 PM@@16:00 - 18:00" "06:00 PM - 08:00 PM@@18:00 - 20:00"]
So please try to test the live demos once again here https://bs.wpbookingcalendar.com/
Watch it in this video guide https://wpbookingcalendar.com/help/booking-calendar-video-timeslots/
Thank you.