Remove

The short answer is that the gray area that you are seeing in lower bottom of the window is actually the editor area (aka document area) and you can hide it by adding run.args.extra=-J-Dnetbeans.winsys.hideEmptyDocArea=true to your platform.properties file. Or by calling System.setProperty("netbeans.winsys.hideEmptyDocArea", "true"); from one of your module’s Installers. That’s all you need to know but if you are interested on getting some details and references continue reading. If you create a new Netbeans RCP application and only add TopComponents to modes other than editor (modes which kind=“view”) then you will end up with an empty document area (could be at the bottom, top, left, right or in between TopComponents depending which modes you placed the TCs on). But first, you ask, how do I assign TopComponents to modes? Well you do that in the new Window wizard for example ...

The default Netbeans Platform Application generated by the Netbeans IDE wizard has the Save, Undo and Redo button showing up in the toolbar by default. Since my applications doesn’t have anything to save I decided to hide those buttons. I turns out that remove them is really simple, I knew that I had to fiddle with the layer.xml file and hide something but I didn’t know exactly what. At the end I found the solution buried in this A NetBeans Platform Sample and Tutorial. ...