If I've got it correct, in FAT12, each directory-entry use 2 bytes to define a fire or subdirectory in a directory. It's a field that called the First Logical Cluster that is needed to specify where the file or subdirectory begins. Is the value of the First Logical Cluster is "0", then it refers to the first cluster of the root directory.
If you select the picture you can go right to the tools for the picture. You can use a picture editor or just the main picture tools depending on what type of computer you use.