Intended use: Enable a user to print a single photo, a selection of multiple photos, or a goup of images (tags / sets) – in a selected size.
Will need to consider non-US sizes as well
The Configure button should pop up the standard printer options dialog and update the text with the new settings once the standard print dialog is dismissed.
Preview is a live preview. Double-clicking on each picture should allow one to edit the properties of the picture, including (most importantly) the name, which should be selected so a user could simply type in a new name and hit enter. By default, the names should be set within the standard window of the application itself.
The magnification button should allow the viewer to see the image larger, in a separate window (although this might not be necessary).
The following may or may not be inspiring.