One of the downsides of using splitter bars (panes) is that, even when a VI's main window is resizable, if you hide the scroll-bars of the bottom-right pane, the resize window image () goes away (as shown below).
Sometimes, you might want to keep the resize window handle, such as cases where you use panes to create a status bar at the bottom of the window, as we do with VIPM (shown below).
While there's no obvious way to do this in LabVIEW, you can use an image decoration (an image of the resize window handle) to achieve the effect.
To see an example, download this VI (LabVIEW 8.2 or greater): Show Resize Window.vi (zipped)