Hold left mouse click app in dock used to show all open windows for that app? Now it seems to be gone in Mountain Lion. Any ideas how to bring this back please? It was kind of like Expose, but only for THAT specific app, not all open apps. Now I have to Left mouse click hold, then move the mouse down to Show all windows. This is not convenient enough. I do not have, not want to use or buy a mouse pad thingy with multi finger gestures by the way. Normal (None magic) mouse controls only please. Ta.