As its name implies, this program lets you view your image files in full screen. It is very simple to use. When opening the application, a black screen will appear, showing the menu shortcuts for its different functions. Also, a window will appear for you to open the desired file.
Once you have selected the file you want to open, it will appear on a full screen. Then, you can use the different menu shortcuts, which are mainly the F keys. For example, F2 opens the image file information, such as file name, location, and original resolution.
By clicking the right button, the program shows a context menu that allows you to open a new file or show the previous or next files in the folder. Thus, you can use it to create slideshows with your photo albums. Unfortunately, you can't save these slideshows, which could have been a good feature.
An interesting function is the ability to view files in 3D. The program takes the blue and red channels and separates them so you can view the image in 3D using red-and-blue stereoscopic lenses.
In sum, it is a simple program that does little more than what its name implies. If you don't expect a very complex program with lots of features, then you may want to give it a try.