The Gallery app presents all of the pictures and videos stored in your phone, including those you’ve taken with the Camera app and those you downloaded from the web or other locations. When another app saves a picture, it automatically creates a download album to contain the picture (e.g., capturing a screen shot creates the Screenshots album.
Tap an album to open it and view its contents, then tap a picture or video to view it.
Touch and hold an album to access Share, Delete, and Details.
Tap the Options icon to access New album, Delete, Set preferred albums, and Settings.
Tap the Camera icon to return to the Camera app.
Tap the Menu icon to open the Gallery menu to access Albums, Videos, and Favorites.