Show for X when images X in the last X days: You may choose to display a small "New" icon overlay on image thumbnails, folder thumbnails, both, or neither, for new images. For a folder, the icon is displayed if that folder contains an image (at any lower level) that meets the criterion. The "newness" of the image may be determined by the date it was added to the project or by the date on which the photo was taken. The number of days is calculated relative to the date on which the album is created.
The text that is displayed, which defaults to NEW, is set under Text. Its size and style can be adjusted under Fonts » Index Page. When a visitor hovers on the "New" icon, the popup tooltip shows the date on which the image was added or taken. The tooltip prefix, which defaults to Added: or Taken:, depending upon the "newness" criterion chosen, is set under Text » "New" Overlay. The date format is taken from the jAlbum setting under Album » Settings » Advanced » General.