I have just started using OS X on my brand new MacBook Pro. Being a long time windows user brings with itself some painful changes. But first I need to applaud the genius touch pad; its a joy to work with. However, there are situations where you need to use an external mouse. I have been a fan of the Logitech MX series of mice, and owns at least 7 of them. But the button configuration is not as I prefer: Mouse button 3: In windows did I use it to close and open tabs in browsers, and autoscroll when the pointer was not located over anything clickable. In OS X does it bring up the dashboard. Mouse button 4 & 5: In windows did I use these buttons to go forward and backward (like the 3 finger sideways swipe). In OS X does Mouse button 4 open expose (clever, but Mouse button 6 is the app switching button) I have tried USB overdrive, Logitech Control Center (only compatible with the MX510 not MX518) and Steermouse. None of with solves the problem with Mouse Button 3, 4 and 5. Any suggestion for another mouse modification app? Are there setting I have missed in the apps I have tried?