This factsheet explains the buttons common in Netscape 4.x for both Unix and Windows.
Buttons are shortcuts to the most commonly used features.
Those features and all other features are also available by using the dropdown menus. Another means of accessing the most common features used at a specific time is to use the right mouse button. Experiment with it to see what choices you get in different places and times. Certain buttons will display a menu of choices if you hold the left mouse button down for more than a second or two. These are usually denoted by a small down facing triangle in the upper right hand corner of the button.