On a website I have a map-like gizmo and list-like object. Both has their controls - the map has a google-map-like zoom giozmo and the list has simplified scroll bar. But both can be navigated using the mouse wheel once the mouse hovers over the object.
The problem is that for most users it is not obvious that they can use the mouse wheel to interact with the objects. It is probably the result of a broken convention where mouse wheel scrolling doesn't work as it should across all browsers and technologies (Flash?).
How can I make it obvious to the users that they can use mouse wheel to interact with the objects?
- make a mouse wheel icon blink briefly over the map and list?
- auto-move the map and list slightly every time the website loads for the first time?
- any other ideas?