How to make Orbit (Alt-Drag) work on OpenBox

According to this Scene View Navigation manual, you should be able to orbit the camera by pressing Alt and dragging with mouse. On OpenBox the Alt-Drag moves the window by default and therefore the orbiting doesn't work in Unity.

I got this working by commenting out (or deleting) the following lines from ~/.config/openbox/rc.xml
<mousebind button="A-Left" action="Press">
<action name="Focus"/>
<action name="Raise"/>
</mousebind>
<mousebind button="A-Left" action="Click">
<action name="Unshade"/>
</mousebind>
<mousebind button="A-Right" action="Drag">
<action name="Resize"/>
</mousebind>
<mousebind button="A-Left" action="Drag">
<action name="Move"/>
</mousebind>

Remember to run openbox --reconfigure afterwards.

 

Good to know. Same behaviour on Linux Mint.
I'd actually like to use the middle mouse button to orbit, same as in Blender.