Never show content. The Reading Pane always shows only the selected item's header. A banner provides a link to open the original item.

When in Vault Cache (default). The Reading Pane shows the selected item's header. If the item is in Vault Cache, it also shows the content. If the content is not shown, a banner provides a link to open the original item. When the Vault Cache content strategy is Store only items that user opens, the effect of this value is that the Reading Pane only shows the content of previously opened items.

Always show content. The Reading Pane always shows the header and content of the item that is selected in Virtual Vault.

You have upgraded from an earlier release.

In the earlier release, Show content in Reading Pane had the value Always show content.