Normal And Italic Fonts On Same Line Changing

DocumentID: 607419
Revision Date: 29-Feb-96 1:32:27 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Symptoms: When the customer uses regular and italic fonts on the same line, the line height from that point on is different than if just regular fonts are used. The customer has an HP LaserJet 2000 printer and is using the driver dated 11/09/90. The customer is using Times Roman 8pt and 10pt built-in fonts and 8pt and 10pt italic Bitstream fonts. Solutions: According to Development, the Line Height feature is working correctly. The typeface proportions are different in the two typefaces. In CG Times, the caps height is 66.07% (of the point size) and the descender height is 22.14%. In CG Times Italic they are 67.86% and 21.43%. This means that the portion of the font above the baseline (top shoulder height) is larger for CG Times Italic, but the portion of the font below the baseline (bottom shoulder height) is larger for the CG Times font. In calculating automatic line height, WordPerfect takes the largest top shoulder height on the current line plus the largest bottom shoulder height of the previous line and adds them together (and also adds the leading adjust values and an additional 2pts in the case of PS fonts). This allows WordPerfect to combine very different fonts in the best way possible, especially when you are working with different point sizes. In this case, the lines where fonts are combined have a larger total of the top and bottom shoulder heights, so the lines end up 204/1200" apart whereas they are 200/1200" (12pts) apart in only one font. The algorithm seems a little strange in this case because you would expect the lines to space 12pts apart together since they do separately, but unless WP lies about the fonts and say that their proportions are the same (which they aren't), then it will work in this manner. If a customer has normal text in a document that extends over several pages and has one italics code or one bold code on one page, the last line of that page is at a different position than the last line on all of the other pages. A way to get every page to print on the same line with one or several italic or bold codes, is to set a fixed line height (Shift-F8, 1, 4, 2) at .17".

Answer:

Details:

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