The Default Filter drop-down list allows you to select a WorkView filter to use as a default filter for the selected queue. If the Use only selected filters option is selected, only those filters will be available in the Default Filter drop-down for selection, otherwise, all WorkView filters configured with the Available as a Workflow Inbox Filter option that the user has permission to will be available.
When a default filter is selected, the queue is automatically filtered and the WorkView objects displayed reflect that filter's specifications. If you choose a filter from the Filter Inbox right-click option, it will override the selected default filter and the display will reflect the newly chosen filter. When a filter has Workflow Queue configured as a display column and the Combined View is not showing, the filter applied will not show results related to the currently selected queue.
Use caution when using a filter with a queue configured with the Auto-Feed option. Ensure that the desired filter will not prevent items from displaying for any user.