This command saves your character's current facial configuration (how your character's face looks) to the specified file.
spf [file name]
|File Name||The name of the file to save your facial configuration to (e.g. 'face.npc'). This will be saved in the game's root directory (where Skyrim.exe is).|
This would save your character's current face to the file face.npc.
SavePCFace is an alias of the SPF command - it has the same function.