How do you you compute margin in elite and pica typewriter?

To compute the margin on an Elite or Pica typewriter, first determine the typeface's pitch: Elite is 12 characters per inch, while Pica is 10 characters per inch. To set the margin, count the number of spaces (characters) you want from the left edge of the paper, then multiply that number by the pitch to convert it to inches. For example, if you set a 5-character margin in Pica, it would be 0.5 inches (5 characters ÷ 10). Adjust the margin using the margin release lever or slider accordingly.