At the top bar, in-between 'View' and 'NavMesh,' there is a drop down menu called 'World.' The first option on the list is 'World Spaces...'

When I click on it, it brings up the World Spaces window. The problem is, it's too big. A rather large portion of the bottom part of the window is cut off by my task bar. You can't simply reduce the size of the window by dragging the edges with the arrow icon, as you can with, for example, the Object Window. You also can't maximize it; you can only minimize it or exit out. Minimizing also doesn't help, as it makes it too small.

Any advice offered would be appreciated...

Look into this http://www.gamesas.com/topic/1369902-new-reference-alias-window-is-too-big-help/page__fromsearch__1.