Ticket #581 is a similar request: http://sf.net/p/geany/feature-requests/581/

In addition I would love to hide / collapse all those panels (including the bottom / message panel) with a single click, similar to like other popular IDEs (e.g. MS VisualStudio, PyCharm) have it.

Examples:
- http://www.jetbrains.com/pycharm/webhelp/pycharm-tool-windows.html
- http://www.yevol.com/en/visualstudio/images/wndexpand1.gif (Toolbox collapsed)