By default, the Start button opens Epson Scan when you press it.
You can assign the Start button to open a program in the Epson Event Manager to make scanning your projects even quicker.
Note for Mac OS X 10.5.8 users:
Navigate to the Start screen and select Event Manager.
Windows (other versions):
Select or Start > Programs or All Programs > Epson Software > Event Manager.
Mac OS X:
Select Applications > Epson Software, and double-click the Launch Event Manager icon.
You see the Button Settings tab in Epson Event Manager.
Now whenever you press the Start button, the action you selected occurs.