Chapter 10: IBM - Standard Functions
10-5
Proportional
spacing
For certain applications the maximum number of characters in a
line has to be indicated. This depends on the pitch selected. The
following table shows the maximum number of characters per line.
Pitch
Characters per line
Narrow printer
Wide printer
5 cpi
40
68
6 cpi
48
81
7.5 cpi
60
102
8.5 cpi
68
116
10 cpi
80
136
12 cpi
96
163
15 cpi
120
204
17.1 cpi
137
233
20 cpi
160
272
Function
Dec.
Hex.
ASCII
Start proportional spacing
27 80 49
1B 50 31
ESC P 1
Stop proportional spacing
27 80 48
1B 50 30
ESC P 0
With proportional spacing the spacing between the individual let-
ters varies according to the respective character width. With a fixed
pitch all characters are created within a matrix of the same width.
Proportional spacing, however, gives wide characters such as »w«
or »M« more space and narrow characters such as »I« or »f« less
space. The result is an attractive and more legible print image than
with a fixed pitch.
Because of the different character widths proportional fonts do not
have a fixed pitch. Precise margin settings in the case of full justi-
fied text, for example, is only possible if the word processing pro-
gram supports proportional spacing.
This function can also be activated via the Proportional Spacing
menu item or via the control panel. Proportional spacing is also
available via multifunction commands.
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