You can control the visibility of graphics by storing them in a named graphics layer. The graphics layer will be listed in the ArcGlobe Table of Contents, where you can turn it on and off like other layers.

To do so, click View, point to Bookmarks, and click City Hall. Click Graphics and click New Graphics Layer on the 3D Graphics toolbar.

The New Graphics Layer is added to the Table of Contents under Draped layers.

Double-click the New Graphics Layer to open the Layer Properties dialog box. Type "My Buildings" in the Layer Name text box.

Check Don't show layer when zoomed. Type "3" in the out beyond text box. Click OK.