Lenovo ThinkPad 770E-ED TP 770X User's Reference that shipped with the system - Page 67

Neither, Choose Scrolling Method, Press Center Button, then use TrackPoint, Use External Mouse

Page 67 highlights

Customizing the TrackPoint - Neither This function disables the scrolling and magnifying glass functions. Choose Scrolling Method Select one of the following radio buttons: - Press Center Button, then use TrackPoint This option enables you to hold down the center click button and then use the TrackPoint to control the scrolling or the magnifying glass. When you are not holding down the center button, the TrackPoint operates normally; that is, it controls the mouse cursor. - Use External Mouse This option sets an externally attached mouse to scroll (or move the magnifying glass) horizontally or vertically. The TrackPoint functions simply as a cursor. - Use TrackPoint This option sets the TrackPoint to scroll horizontally or vertically without your holding down the center button. Use an externally attached mouse as a cursor. You can still use the TrackPoint to control the mouse cursor by pressing the center button. The Use External Mouse and the Use TrackPoint radio buttons are enabled only if a mouse is attached. Chapter 2. Extending the Features of Your Computer 53

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Customizing the TrackPoint
Neither
This function disables the scrolling and magnifying glass
functions.
Choose Scrolling Method
Select one of the following radio buttons:
Press Center Button, then use TrackPoint
This option enables you to hold down the center click button
and then use the TrackPoint to control the scrolling or the
magnifying glass.
When you are not holding down the
center button, the TrackPoint operates normally; that is, it
controls the mouse cursor.
Use External Mouse
This option sets an externally attached mouse to scroll (or
move the magnifying glass) horizontally or vertically.
The
TrackPoint functions simply as a cursor.
Use TrackPoint
This option sets the TrackPoint to scroll horizontally or
vertically without your holding down the center button.
Use
an externally attached mouse as a cursor.
You can still use the TrackPoint to control the mouse cursor
by pressing the center button.
The
Use External Mouse
and the
Use TrackPoint
radio buttons
are enabled only if a mouse is attached.
Chapter 2.
Extending the Features of Your Computer
53