Make sure you are logged into the system (your name will appear in the upper right hand corner of the screen). Although this option is available to the public, not all buildings are available for view unless you do so. If you are logged in and still don't see the building you want, under "Browse," select "Browse for Space," then click "Filter" on the far right side of the screen. When the dialog box opens enter the date and use the "Facilities" drop-down menu to view buildings. Select your desired facility/building and click "Apply" to see availability.