just my attempt: all panes in the Poser window have a VERY little square at their right upper corner. Click it, and you can choose Docked, Floating, etc.

Select Floating, and drag the window as said by Khai-J-Bach. In menu Edit > general preferences, Interface tab set Launch Behavior to "previous state".

You can, for instance, separate out the Document window on Floating one monitor and leave all other panes - docked - on the other.

Relaunch the interface to "factory state" when things have become a mess, and restart Poser. Then you can start fresh again.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though