| x | The value of the x coordinate (in view coordinates of the layer) of the position where the mouse button was released. |
| y | The value of the y-coordinate (in the display coordinates of the layer) where the mouse button was released. |
| button | The mouse button that was released. One of the following values: mbLeft : Left mouse button released mbMiddle : Middle mouse button released mbRight : Right mouse button released mbX1 : Mouse side key first button released mbX2 : Mouse side key second button released |
| shift | The state of the shift key that was pressed at the same time when the mouse button was released.
It is a combination of the following values by bit OR. ssAlt : ALT key was pressed ssShift : SHIFT key was pressed ssCtrl : CTRL key was pressed |