Janome DigitizerPro Instruction Book page 265

Octagon Monogram
Octagon Monogram is a special monogramming alphabet using three sets of
the upper-case alpha characters.
Alphabet contains
Colors
Stitching
Recommended height
JANOME Embroidery Software Instruction Book
Left, Center and Right letters for 3-letter monogram. Use
symbols for the left letter, upper case for the center letter, and
lower case for the right letter.
1 color
Satin
Minimum 0.7 in
Maximum 4.0 in
Appendix C Packaged Fonts
18 mm
100 mm
263