You can view digital images in the file manager or use Gwenview. Start Gwenview by pressing Alt+F2 and entering gwenview. Gwenview can load and save all image formats supported by KDE. It shows them either as thumbnails, in full screen view, or in slide show mode. When browsing JPEG images with EXIF information, Gwenview automatically rotates them according to the EXIF Orientation tag.
For managing and editing your digital images, digiKam is the right choice: download your images from the camera, edit and improve them, organize them in albums (or flag them with tags for easy retrieval, independent of folders or albums), and archive them on CD or export them to a Web image gallery.
To start digiKam, press Alt+F2 and enter digikam. Find an introduction to digiKam in Chapter Managing Your Digital Image Collection (↑Application Guide).