| OnScroll | Fired on horizontal or vertical scrolling. |
| OnOptionsChange | Fired after some option has been changed by user. For example, image scale can be changed by (Left mouse button + Wheel) shortcut. |
| OnAfterPaint | Fired after image painting is done. You can use this event to perform some custom painting on the image, e.g. draw lines, circles etc. Canvas and painting rectangle are passed as parameters. |