The controller bindings can be found here. You can customize them with the SteamVR bindings UI.

Knuckles / Vive Index Controller

Vive Wand

General Notes about Controller Input

• The Push/Pull and Scale actions are executed while a window is being grabbed.
• Each controller can independently grab and Push/Pull/Scale windows, therefore Push/Pull and Scale only work on the window that is being grabbed by the same controller.
• Keyboard input is sent to the window that is being pointed at by the controller that executes the Open Keyboard action. It is not necessary to grab a window to open the keyboard. The keyboard's location in space is determined by SteamVR; the location where the keyboard appears can generally be influenced by the view direction of the HMD.
• The menu can only be opened by pressing Toggle Menu by a controller that does not currently point at a window. We are looking to find better ways to open the menu (gestures, ...). The UI Click action refers to pressing buttons in this menu.
• If only one controller is active, the menu will appear in a window which is head tracked and always stays in the view of the HMD. If two or more controllers are active, the menu will be attached to the controller that executed the Toggle Menu action, and has to be used with the other controller(s).
• For 2D input, only one controller can produce mouse movement and clicks at the same time; the controller currently used for mouse input is indicated by this controller controlling the mouse pointer. Pressing Left Click with another controller will switch control over the mouse pointer to this controller. Pressing Left Click to switch control over the cursor to another controller will not generate an actual left click for the window.