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External display configuration confusion

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linux-howto

http://crunchbang.org – Don''t know about the rest, but for primary monitor, you might want to have a look at Settings >> Openbox >> GUI Config Tool, on the Windows tab.  (Not certain if this is what you're referring to; I'm sure even the developers use the term in various ways.)  For Tint2 appearing on which monitor,  have a  look here, specifically at the part about strut policy. (HowTos)