The Garmin Nuvi 255w GPS navigator does not have much multimedia function, but it does have a decent Picture Viewer, enabling us to use it as a digital photo frame. Its 4.3" screen is good enough for this purpose.
If your digital camera can store photos into SD card, what you need to do is just to take out the SD card from your camera, and slot it into the Nuvi 255w. Then, switch on the unit and tap on Tools > Picture Viewer.
The screen will then show 9 thumbnails of the pictures found. You can navigate from one screen to another by tapping on the up/down arrow keys.
Tap on the picture to show it fully on the screen. Tap it again and you are able to show it in Full Screen mode, as well as enlarge or reduce its display size.
When displaying a picture, tap on the Info button to see the info of the filename, camera make and camera model. You are also given an option to use this picture as your Garmin nagivator's startup screen when power on.
In the thumbnail display screen, you can also tap on Slide Show to auto show the pictures one by one.