You may need characters or symbols that do not appear in any of the installed fonts. However, if they are simple enough you can draw your own, by defining a ".char" object (that automatically scales with changes in font size).
Example: define two new characters:
.char \[MS] \ \"begin char definition \Z'\Z'\[ci]'\ \"a circle \h'\w'\[ci]'u/13u*10u'\ \"move right 10/13 of the circle's width or diameter \v'-\w'\[ci]'u/13u*10u'\ \"move up 10/13 of the circle's height or diameter \D'l \w'\[ci]'u/3u -\w'\[ci]'u/3u'\ \"draw a line up and to the right = diameter/3 \Z'\D'l -\w'\[ci]'u/5u 0\ \"draw a line horizontally = diameter/5 \Z'\D'l 0 \w'\[ci]'u/5u\ \"draw a line vertically = diameter/5 \h'\w'\[ci]'u/5u*6u' \"move right 6/5 a diameter . .char \[FS] \ \"begin char definition \Z'\Z'\[ci]'\ \"a circle \h'\w'\[ci]'u/2u'\ \"move right half a diameter \Z'\D'l 0 \w'\[ci]'u/2u'\ \"draw a vertical line down = diameter/2 \v'-\w'\[ci]'u/6u'\ \"move down diameter/6 \h'-\w'\[ci]'u/4u'\ \"move left diameter/4 \D'l \w'\[ci]'u/2u 0\ \"draw a horozontal line right = diameter/2 \h'\w'\[ci]'u' \"move right one diameter . .\" Example usage .LP \s[20]Male Symbol: MM\[MS]MM\s0 .sp .LP \s[20]Female Symbol: MM\[FS]MM\s0
(Using ms macros and enclosing the symbols between "MM" and "MM" to show how they fit into running text).
Tip contributed by Ted Harding
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