Epson PP-100II Technical Reference Manual page 58

Specifying the print area
If the file type of the label file is any one of BMP/JPEG/TIFF/PNG, the outside/Inside diameter of the print area can be specified.
This setting is optional.
Specify the print area within the area of disc label printing. If the outside of the label printing area is
specified, ink may contaminate the surroundings.
LABEL_AREA=DiscDiamOut: Outside diameter (tab character) DiscDiamIn: Inside diameter
 Outside diameter (optional)
Specify the outside diameter of the disc print area in units of 1/10 mm. Available area is 700 to 1194. When it is not
specified, the outside diameter is set to 116 mm.
 Inside diameter (optional)
Specify the inside diameter of the disc print area in units of 1/10 mm. Available area is 180 to 500. When it is not specified,
the outside diameter is set to 45 mm.
Outside/inside diameter image
58
DiscDiamOut
DiscDiamIn
Print area
Outside of print area