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

EN Half-Line Feed Command 6-13
Half-Line Feed Command
The Half-Line Feed command moves the cursor to the same
character position one half-line down. The distance moved for a
Half-Line Feed is one-half of the current line spacing (defined by the
last VMI or line spacing setting).
? =
Vertical Cursor Positioning Control Codes
Two control codes can be used to position the cursor vertically. These
control codes are explained below.
LF - Line Feed
Advances the current active position (CAP) to the same horizontal
position on the next line. The distance to the next line is defined by
the current line spacing (defined by the last VMI or line spacing
setting). (Refer to “Line Termination Command” later in this chapter.)
FF - Form Feed
Advances the current active position (CAP) to the same horizontal
position at the top of the text area on the next page. (Refer to “Line
Termination Command” later in this chapter.)