Sony Reader PRS-950 - Manual (Page 170)

Supported File Formats
170
Table of Contents Index
Picture
 JPEG file (.jpg or .jpeg file extension)
 GIF file (.gif file extension)*
 PNG file (.png file extension)
 BMP file (.bmp file extension)
* For an animation GIF file, only the first frame will be shown.
Note
A large file size of picture may not be displayable, and its file
will not appear in the list. Delete the picture file using Reader
Library.