Homelite HL-1050, HL-P2500, HL-1660E, HL-2400CE, HL-1450, HL-1250, HL-1470N, HL-1070, 2060 Terminology

10/10/03

3.TERMINOLOGY

3.1.Picture Frame

The printer frame is the rectangular area of the page on which graphic output can be printed. This is based on the logical page defined for the selected paper size.

3.2.Anchor Point

The anchor point of the picture frame is the top left hand corner of the frame. This can be moved on the page using PCL language page control commands.

3.3.Graphics Window

The graphics window is the rectangular area of the page on which you can generate graphic output using HP-GL/2 commands. Initially the graphics window is the same as the picture frame but may be altered using the HP-GL/2 IW command.

3.4.Hard Clip Limits

Hard clip limits are the physical restrictions which define where printed output can appear on a page.

3.5.Soft Clip Limits

Soft clip limits are the user-defined restrictions which define where printed output can appear on a page.

3.6.Graphics Units

The initial coordinate system employs units of 1/1016" in both the x- and y-axes.

3.7.User Units

The HP-GL/2 graphics language uses a coordinate system. You can impose your own x- and y-scale units on this system using the SC command.

3.8.Current Units

The units in use at a given time are called the current units. Current units are either user units or graphics

units,	depending on whether scaling has been turned on or not. The SC command is used to turn scaling
on,	that is, to make user units the current units.

3.9.Pens

By convention, certain HP-GL/2 graphics language commands are thought of as using a pen, which can be either up or down. To produce plotted output the pen must be down. To move to a location on the page without producing output the pen must be in the up position. Some HP-GL/2 commands require you to specify the pen position before you use them, others have implied pen positions built into them, so that you do not need to specify "Pen up" or "Pen down".

CHAPTER 4 HP-GL/2 - 7