IBM F50 RS/6000 7025 - Manual (Page 32)

Using the Three–Button Mouse
The mouse is a hand–operated locating device. A three–button mouse is available
for use with the system unit.
Consult your application publication for the exact use of the three–button mouse.
You can use the mouse to perform such functions as positioning a cursor, selecting
items from a menu, or moving around in your document much easier and faster than
if you used only the keyboard. The cursor moves exactly as you move the mouse on
a flat surface, such as a desktop.
When you move the mouse around on a flat surface as shown in this illustration, the
cursor moves on the display screen; the movement changes the position of the
cursor.
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