The term view refers to the column, sorting, display and filter properties of the Item Grid. You can create a variety of views in your database to display items in different ways depending on your needs.
For instance, you might create a view in your database called High Priority designed to filter out all items except for those marked High Priority. This view would probably include a <Priority> column to make it easy to change the priority level (High, Normal, Low) of items. The view might also include a <Due Date> column to make it easy to set a due date for these items. The view could also be set up to sort items by <Due Date>. Once you have created a view like this, you can apply the view to any folder in your database and the items in the folder will be displayed accordingly.
When you apply a view to a folder, items in the folder may disappear from view. This doesn't mean the items have been removed from the folder, it means the items were filtered out by a filter associated with the view. A filtered view lets you look at smaller sets of items in a folder without modifying the contents of the folder in any way.
To create a new view for the active folder, click the Smart button and choose View | New View from the pop-up menu. To apply an existing view to the active folder, click the Smart button and choose View, then select the view you want to apply from the extended menu.
The Default View is a special view included in every database. The Default View is used for folders that currently have no other view applied. When you create a new folder, for instance, the new folder will initially use the Default View until you apply a different view to the folder. The Default View typically includes the most common and useful columns and sorting properties for a given database.