You can install the eog-plugins package to get extra plugins for the image viewer. Plugins add additional features, like the ones listed below.
You can install the eog-plugins package using your Linux distribution's package manager.
The following features are included in eog-plugins:
Exif display: Displays camera settings and histograms for digital photos.
Flickr Uploader: Create a Tools menu item to quickly upload your pictures to Flickr.
Map: Display the geolocation of a digital photo on a map.
Send By Mail: Send a picture to a friend by attaching it to a new email.
Slideshow Shuffle: Shuffles images in slideshow mode.
Zoom to fit image width: Adjusts the zoom to have the pictures's full width fit into the window.
Python Console: A Python scripting console for the image viewer.
PicasaWeb Uploader: Upload your pictures to PicasaWeb.
You can manage plugins by using the the Plugins tab in the Preferences window.
