Once you have installed Seating Charts add-on, let's first take a look at its basic settings. Head over to Tickera Settings area where you should be able to see a new tab named Seating Charts.
Within this tab, you will find two main sections of the settings: General Settings and Firebase Settings. Let's break it down and see what is what.
General Settings offer you to select a coloring for each of the seat "states": Reserved, In Cart, In Other's Cart and Checked In.
Within this area you can set up your Google Firebase account credentials which Seating Charts add-on can be used with. Using Seating Charts add-on with Firebase is not mandatory but the main benefit for this would be the ability to display seats that are in someone else's cart in real time which, consequentially, disables the ability for customers to purchase the ticket for the same seat at the same time. Thorough instruction on how to create and configure your Firebase account can be found here where you can also find out how to get all the credentials needed to set up this part.