You may have instances where a guest needs to check in and out on the same day. This can be registered as follows in the calendar.
The following images demonstrate how this can be achieved.
Image # 1: Select the grid of the room and date for your reservation and create new reservation. Manually change the check out date to the same date as the check in and complete the rest of the registration details
Image #2: The reservation will now be represented on the calendar by a small circle, rather than a block.