You need to activate the EQS feature inside UE4 : https://docs.unrealengine.com/en-us/Engine/AI/EnvironmentQuerySystem/QuickStart/2
- move the player / interact with world with the left click
- Left Shift+ click will force the player to make an attack
- Alt will toggle Item labels visibility
- I to display the player menu
- P to display the In Game menu
- &, é, ", ', (, -, è, _, ç, à (keys on top of your keyboard) for quick access to the items/spells inside your QuickAccessBar
Note : I use a AZERTY keyboard. If you want to rebind some stuff to other keys just go inside Edit -> ProjectSettings -> Input and bind the actions to the keys you want.