The "Facility Text and Labels" settings are a great way to customize the language used in your Online Booking and Waivers modules. The following article is going to serve to demonstrate exactly what these settings change on your customer facing sites.
To access these settings, go to Admin > Facility > Facility Text and Labels
In Action - Online Booking
The only setting currently for Online Store is the Invoice Email Subject, see examples in "Global" for a visual aid.