Xpresso 2009 Features
Task pane shows you what to say
If you don't know which commands you can say, no problem, the new Xpresso task pane provides a command list of active commands — commands not hidden or suppressed that are available in your current SolidWorks® context. From this pane you can show all commands as well as access the Command Editor to customize commands to your preferences.
Xpress commands 
In addition to over 500 SolidWorks® commands, Xpresso introduces a new concept in productivity: Xpress commands. Each Xpress command combines several standard actions into one quick and easy voice command. Use simple phrases such as mate coincident, cut through all, Xpress cylinder, and 60 more to create the fundamental building blocks of parts faster than ever! Some commands save 8 or more mouse clicks.
Customize your commands
By popular demand, you may now call it what you want. Change the spoken phrase Xpresso listens for to your preferred phrase. Suppress commands you never use or hide commands you already know and don't need to see in the task pane.
Command list 
Xpresso give you access to over 500 voice commands which are standard SolidWorks® commands. Saying a command rather than selecting the same command with a mouse eliminates hunting through toolbars, menus and icons. If you don't know which commands are available for use in your context, click on the handy Task Pane for a list and tool tips to help.
Xpress change units
Change the units of a dimension in an instant. Simply select the dimension, say the unit you want and Xpresso changes it for you. Using decmials and need fractions? Sixteenths. Need to change from feet to meters? Meters. It's that simple.
Improved command filtering
Context referencing means Xpresso only listens for commands that make sense, which means you don't spend hours training like with other speech recognition software. As little as ten minutes of training and you will be telling SolidWorks® what to do. Literally.
Xpress mates
Build assemblies faster than ever with Xpress mates. Simply click the parts then tell SolidWorks® the mate you want. Try mate coincident, mate perpendicular, or mate parallel.