IBM 240 Left click button, Stick, Right click button

Distinctive functions of your computer
ThinkPadThinkPad
Left click button
Stick
Right click button
If you are not familiar with using the TrackPoint, these instructions
will help you get started:
1. Place your hands in the typing position and press gently with
either index finger on the stick in the direction you want the
cursor to move.
Pressing the stick away from you moves the cursor up the
screen; pressing it toward you moves the cursor down the
screen. You can also move the cursor side to side by pressing
sideways.
Note: The cursor may drift. This is not a defect. Do not use the
TrackPoint until the cursor stops moving.
10 ThinkPad 240 User's Reference