BASIC CONCEPTS

Grids

The location of a form element on a page is specified in terms of its horizontal and vertical displacement from the form origin. The units of measurement used to define this displacement can be any of the following:

·Linear unitsÐinches or centimeters

·DotsÐ300 per inch

·XdotsÐ600 per inch

·cpi and lpiÐcharacters per inch horizontally and lines per inch vertically.

x and y coordinates

The y coordinate describes the vertical position on a grid. The x coordinate describes the horizontal position. When both coordinates are given together, the y coordinate is always specified first.

If you draw a horizontal and a vertical line through the form origin to create x and y coordinates, you would express the location of the form origin as y=0, x=0.

If you draw more lines to mark horizontal and vertical measurements away from the form origin so that the lines were one unit of measurement apart, you create a grid like the one shown in figure 1-11. You can then position form elements (lines, boxes, and so on) by specifying a grid location.

Figure 1-11. Form grid

Form origin (y=0,x=0)

1

Character cell origin at (y=2,x=1)

2

1 2 3 4

X

A

3

Y

1-12

XEROX 4050/5090/4450/4650 LPS FORMS CREATION GUIDE

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Image 20
Xerox 4450, 4650 manual Grids, Y coordinates