Red Hat Enterprise Linux is designed to use a three-button
mouse. If you have a two-button mouse, you should have selected
three-button emulation during the installation process. If you are
using three-button emulation, pressing both mouse buttons at the
same time equates to pressing the missing third (middle)
button.
In this document, if you are instructed to click with the mouse
on something, that means click the left mouse button. If you need
to use the middle or right mouse button, that will be explicitly
stated. (This will be reversed if you have configured your mouse to
be used by a left handed person.)
The phrase "drag and drop" may be familiar to you. If you are
instructed to drag and drop an item on your GUI desktop, click on
something and hold the mouse button down. While continuing to hold
down the mouse button, drag the item by moving the mouse to a new
location. When you have reached the desired location, release the
mouse button to drop the item.