<P> Considering the evidence that all - capital printing retards speed of reading to a striking degree in comparison with lower case and is not liked by readers, it would seem wise to eliminate such printing whenever rapid reading and consumer (reader) views are of importance . Examples of this would include any continuous reading material, posters, bus cards, billboards, magazine advertising copy, headings in books, business forms and records, titles of articles, books and book chapters, and newspaper headlines . </P> <P> Colin Wheildon stated that there is an "apparent consensus" that lower - case text is more legible, but that some editors continue to use all caps in text regardless . In his studies of all caps in headlines, he states that, "Editors who favor capitals claim that they give greater emphasis . Those who prefer lower case claim their preferences gives greater legibility ." Wheildon, who informs us that "When a person reads a line of type, the eye recognizes letters by the shapes of their upper halves", asserts that recognizing words in all caps "becomes a task instead of a natural process". His conclusions, based on scientific testing in 1982--1990, are: "Headlines set in capital letters are significantly less legible than those set in lower case ." </P> <P> John Ryder, in the Case for Legibility, stated that "Printing with capital letters can be done sufficiently well to arouse interest and, with short lines, reading at a slowed speed is possible--but in principle too many factors of low legibility are involved ." </P> <P> Other critics are of the opinion that all caps letters in text are often "too tightly packed against each other". </P>

What does an email in all caps mean