Thanks Fuchs. If I set emptyRenderer, we cant see the other link(minimize). I want to remove only maximize button . View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4217788#4217788 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4217788