Right mouse button (or secondary mouse button). Use this to detect right mouse button presses. The 😄 1  mouse button is the secondary button on the user's mouse, which is usually the right mouse button. Unity😄 defines this as the "1" mouse button, as the mouse button numbering begins at 0.

The 2  mouse button is😄 the third button on the user's mouse, which is usually the middle mouse button (often a clickable scroll wheel).