Use shortcuts on an external keyboard with iPad
You can use keyboard shortcuts on an external keyboard to perform the following actions on iPad.
Quickly switch between apps: Press and hold the Command key, then press Tab until you reach the app you want to open.
Open Search: Press Command-Space.
View more keyboard shortcuts: Press and hold the Command key to see shortcuts for the app you’re using.
To use additional keyboard shortcuts, go to Settings > Accessibility > Keyboards > Full Keyboard Access, then turn on Full Keyboard Access. See Control iPad with an external keyboard.
Note: You can change the actions that are performed by modifier keys such as Command and Caps Lock. Go to Settings > General > Keyboard > Hardware Keyboard, tap Modifier Keys, tap a key, then choose the action you want it to perform.