"Global" means per Acme installation, as opposed to per terminal.
Global settings do not affect other installations, for example if you have a Central Acme and Satellite stores. During initial deployment, best practice is to configure global settings in Central Acme then restore them and edit as needed at each satellite store.
Function Keys (in Ticket Entry)
EBT Tenders (Food Stamps, etc.)
Electronic Payments (Credit, Debit, EBT)
User Accounts (Passwords and Privileges)