Hi kgb66,
Here are three ways to put a bar/line over another character:
1. Use a field coded as {EQ \x\to(a)}. This solution increases the vertical
spacing for the affected line (which you could get around by reducing the
field's point size).
2. Use a field coded as {EQ \o (-,a)}. To achieve the desired result,
superscript the first character in the field and subscript the second
character, which leads to small characters for both (which you could counter
by increasing the point size), but this too increases the vertical spacing
for the affected line .
3. Use a field coded as {EQ \s\up6(\f(,a))}. Compared to the other
solutions, this one has the advantage of retaining the character sizes
without increasing the line height. The '6' in the formula controls the bar
height.
In each example, replace the 'a' in the field with the desired character(s).
Cheers