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

14-10 PCL Rectangular Area Fill Graphics EN
The upper left corner of the rectangular area is located at the
cursor position when printing a rectangular area. After printing the
rectangular area the cursor is returned to the upper left corner; the
cursor position does not change positions as a result of printing a
rectangular area.
Rectangular areas are independent of the text area and perforation
skip mode; these boundaries are ignored (rectangles are not clipped
at these boundaries). Addressable rectangular areas are limited to
the logical page. Rectangular areas that extend outside the logical
page are clipped at the logical page boundaries (refer to Figures 2-3
and 2-4 for logical page and printable area boundary specifications).
Transparency mode, described in Chapter 13, controls how the area
fill pattern is applied to the page. Refer to the following section for a
description of how transparency mode affects the rectangular fill area.
A white fill “erases” any data placed within the rectangular area prior
to receipt of the white fill, regardless of the transparency mode
settings. Data placed in a previously erased area is visible.