Change Netbeans preview from an external LookAndFeel <p>I downloaded 4 LookAndFeel(LAF) libraries and one of them is SeaGlass LAF for java GUI, so far I managed to use them by writing this line:</p> <pre><code>UIManager.setLookAndFeel(new SeaGlassLookAndFeel()); </code></pre> <p>but while I'm desinging I have to see what I'm building in the default Metal LAF in Netbeans, so the only way for me to see the real result is by running the application. I know there's a way to change JFrame Preview design, and I know how to do it, but I don't know how can I add my LAF libraries to this list Netbeans provides. So I will really appreciate an answer.. I've looked everywhere, I know there's another guy who talks about something like this in another post but I couldn't found the answer there.</p>