OpenBox has no own panel. That is why it is often used together with lxpanel, but of cause any panel would do.
Keyboard shortcuts to maximize windows
To maximize windows with Super+X
horizontally and Super+C
vertically this
configuration can be used:
<!-- ~/.config/openbox/rc.conf" -->
<keybind key="W-X">
<action name="ToggleMaximize">
<direction>horizontal</direction>
</action>
</keybind>
<keybind key="W-C">
<action name="ToggleMaximize">
<direction>vertical</direction>
</action>
</keybind>
Also see
http://openbox.org/wiki/Help:Bindings http://openbox.org/wiki/Help:Actions