Your controllers in Arthur are designed with differently coloured buttons to make you easily understand which button has which functionality. You are also able to see your hands in Arthur to better understand which finger to put on which button.
Trigger Button: The red button is called the trigger button and can be selected using your index finger. It is mainly used to click in VR.
Grab button: The yellow button is called the grab button, you can find it on the inside of your controllers and it can be pressed using the middle finger. It is mainly used to grab objects in Arthur.
Teleport button: The green button is the Teleport button, it is usually selected with your thumb. With this button, you are able to move in Arthur without actually physically moving.
Main Menu button: The blue button is the Main Menu button usually selected with your thumb. You can open the Arthur main menu to load content into the room or perform different actions.
Long pressing the the menu button opens the Context Menu on items.
Thumbstick: It is usually used with your thumb and allows you to rotate your view as well as rotate and move objects (in combination with the grab button).
Oculus Button: The Oculus button on your right controller will open the Oculus menu where you can perform certain actions.
Mute Button: The Mute Button on your left controller enables you to quickly mute yourself in an Arthur meeting.