Click on the Check in Button at the bottom of the Tab.
IF you are using MyCard Payment Gateway Processing to process credit cards automatically, you can also check in a Guest by do the following:
Image Added Swipe the Guest credit card in the "Active Search" field. This will bring up the guest associated with that credit card and capture the credit card swipe data. From here, just press the check-in button and the check in process is complete. See MyCard
If you're looking for troubleshooting information, please try one of our Support Options!