Epson FX-80 User Manual page 243

19J9J LPRINT "AB"
Very nice. Using two characters side by side provides a larger matrix
and therefore gives more flexibility in character design. But there is
one problem. When two user- defined characters are placed side by
side, there is one intermediate column that contains no dots (unless the
first character is printed in Emphasized Mode).
212
Unused
columns
Figure 18-1. Side·by-side user·defined characters.