Commands for plotting basic characters

The HP-GL/2 filter does not support the following basic character plotting commands and will ignore them if they are included:

Command	Description
DU	Uses the user unit to specify the character plotting direction.
SU	Uses the user unit to specify the character size.
BL	Stores character strings for labeling in the label buffer.
OL	Obtains information from output capable character strings in the buffer.
IC	Obtains the location of certain ASCII character inside the NCP cell.
OB	Outputs the co-ordinates of the upper right and lower left corners around the character on receipt of this command.
LE	Uses the 7240/7245 plotter to underline or change the character width under character set 20 to 28.
PB	Plots the content of the label buffer.