Real estate is going to be limited on a 15" screen. I assume you've got the screen resolution to maximum.

You'll need to decide which windows you need permanently, occasionally or not at all. I never use animation, preview or memery dots, occasionally morph, heirachay and joint.

All my windows are floating with docking turned off. Turn off all but permanent then set all your permanent windows to choice. Turn on each occasional window in turn, move and size it, turn it off and repeat. They can jump behind another window so off/on brings them back to the front. If you leave them with a corner in free space they can be jumped forward.

Bad news is you'll need to do it for the material room and setup room etc. Don't forget to go Edit/General Prefs/Interface to set Launch to Previous State. As hborre says you can always reset to factory default if you get in tangle

 

Poser 11 , 180Gb in 8 Runtimes, PaintShop Pro 9
Windows 7 64 bit, Avast AV, Comodo Firewall
Intel Q9550 Quad Core cpu,  16Gb RAM, 250Gb + 250Gb +160Gb HD, GeForce GTX 1060