Assertion: mouse's button | /r/CapableOf | leave button
Facets:
value: for most left-handed people
type: TRANSITIVE-OBJECT
Source sentences:
text: By default, the selected button is the primary button (nominally under index finger, left button for most right-handed people and right button for most left-handed people).
text: Typing - (with the numeric keypad) selects the alternate button (nominally under ring finger, right button for most right-handed people and left button for most left-handed people).