Key Tronic TRAK101 User Manual page 31

Page 4-2
The TRAK I 01 trackball module has four buttons and a
built-in LED. The two. large trackball buttons function
the same as the left and right buttons on a standard two
button mouse.
The lower left button is the Drag Lock button. The
lmver right button is the auto acceleration button.
Left Mouse
Button
Right Mouse
Button
Auto Acceleration
Drag lock is the same as pressing and holding dovm the
left trackball button. The Drag Lock LED allows easy
detection of Drag Lock status. Pressing the Drag Lock
button causes the LED to illuminate and the trackball to
operate in "lock" mode.
Drag Lock can be used to lock down pull down menus or
highlight text. The LED remains ON until either the
Drag Lock or left trackball button is pressed.
Clicking the left trackball button also causes the LED to
flash.