HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

EN SS, Select Standard Font 23-85
SS, Select Standard Font
This command selects the standard font (already designated by the
Standard Font Definition (SD) command) for subsequent labeling.
Use the SS command to shift from the currently selected alternate
font to the designated standard font.
SS [;]
The SS command tells the printer to print subsequent labeling
commands using characters from the standard symbol set designated
by the SD command. The SS command is equivalent to using the
Shift In control character (SI, ASCII decimal code 15) within a label
string.
The default designated standard font is the Stick font, and uses
symbol set 277 (Roman-8). This font is in effect when the printer is
initialized or set to default conditions. The SS command remains in
effect until an SA command is executed.
Table 23-53
Related Commands Group
AD, Alternate Font Definition The Character Group
DT,Define Label Terminator
FI, Select Primary Font
FN, Select Secondary Font
LB, Label
SA, Select Alternate Symbol set
SD, Standard Font Definition