To zoom in just click on a spot on the map. To zoom out use the controls in the lower right corner of the map(-). You can also just drag the map to better take a look at an area (just click and hold down the mouse and drag the map).  To get to more detail on an area click on the ballon and click on the link in the ballon.

Flex	Industrial	Office	Residential	Warehouse	Retail
hide/show	hide/show	hide/show	hide/show	hide/show	hide/show