annotations.lineEndings
The Line and Arrow tools' Ends picker, in order (any of
'none', 'square', 'circle', 'diamond', 'openArrow', 'closedArrow', 'butt', 'rOpenArrow', 'rClosedArrow', 'slash' — see LineEnding). [] hides the picker, and each tool keeps its own caps.readonly LineEnding[]default all ten