I'm fairly new to IDL GUI design. I was wondering if there is an easy way to extend the iTool system to have all on the same window: 1. a typical iSurface plot 2. a typical iPlot plot 3. custom buttons From reading the IDL help, it seems adding the buttons in a user interface panel to an iSurface window, say, would be easy (like example4tool,example4_panel). It's adding a second iTool below the iSurface, the iPlot, that I'm wondering if would be a simple addition, or if I would have to create a new widget interface.