To drag a booking into a table, when in Collins:
Go to the Floorplan page (third tab in the top bar).
If you have multiple venues, select the Venue in the left-hand side check-in list
To the left of the screen in your Check-in panel, you will be able to see a list of all bookings in for the day in time order
To move the booking by dragging and dropping, simply click and hold down on the booking in question in the list, then drag this to a table in the floorplan. If you are using a touch screen, hold on the booking to move it.
This will then move the booking out of their original table and into the new table
Please note that this feature will not prompt you if there is already booking in a table, or if the table is overcapacity so you will need to manually check this before moving. If the table is locked, you will not be able to drag the booking.