Toggle What's Related   

This button turns the 'Smart Browsing' preference on and off. If you click-hold on the button, you can set the button action to Noisy or Silent. The hotkey is Command-Shift-R

For an explanation of Noisy/Silent, see the Toggle Images button.

Note: The Smart Browsing option is not available on Netscape versions 4.0-4.04. If you lack this option, choose "No What's Related Button" on the Prefs button.