Coming from NX I remember a very useful feature to speed up your work where you can hit the middle mouse button to execute a command or hit OK on a dialog box. For example, you click where you want a hole placed with the LMB, and then you click the MMB to place the hole. Sometimes it can be convenient and faster to not have to move your mouse back to the OK button to execute a command or your hand to the enter key. It would be great if you could at least toggle this feature on or off in the settings.