Why isn't box zoom available?
Box zoom, or the ability to drag a box around the area to zoom into or out of, is not available in the current version of Fractal eXtreme. However, you can gain the same, if not better, functionality with either the following methods:
Essentially, SHIFT-drag zooming is box zoom, but with a real-time "what you see is what you get" (WYSIWYG) preview!
New with version 1.80: Possibly the coolest and fastest way to explore the Mandelbrot is mouse wheel zooming. Just spin your mouse wheel - if you have one - forwards and backwards to zoom in and out. It's quite addictive. You'll hit hundreds of zooms in very short order.