You can optimize the performance of an ArcGlobe document by setting an appropriate visibility distance for each layer. Specifying the visibility distance range lets you control when a layer becomes visible as you zoom in or out. You can either set the minimum and maximum distance for an entire layer, or you can base the layer visibility on individual tile distances.

The check box besides the Buildings layer is grayed out in the Table of Contents. This means the display currently exceeds the layers maximum visibility distance. You will change the maximum visibility distance for a couple of other layers later in this exercise.

In the Table of Contents, right-click the London.jp2 layer and click Properties. Click the Globe General tab and click Don't show layer when zoomed. Type "100" in the Out beyond text box. The units used for this distance are kilometers. Click Check visibility based on each tile distance to enable distance visibility for discrete parts of the layer. Click OK.

This setting, although not enabled by default, further improves performance. When enabled, discrete tiles of data appear visible when navigating near their layer's distance threshold. The layer will be visible between the minimum and maximum distance. Repeat these steps for the Holborn.jp2 layer. Type "5" for the maximum distance for this image.

Click Bookmarks and click City View.