How to show a bar above letters

Thank you for your question, Elizabeth.

If I understand correctly, you are transcribing using UEB with NO Nemeth.

Using UEB for technical material, I would use the braille in the attached image and BRF files.

The first and third lines in those transcriptions are opening and closing grade 1 mode (the opening grade 1 passage indicator is a series of three dots 56, which must be preceded by the three-cell dot locator for use; the grade 1 terminator is dots 56, dot 3, and it also must be preceded by the dot locator for use).

The braille cells in the second line are:

• the opening general fraction indicator
• a pair of braille grouping indicators around AC
• the one-cell symbol for "bar over previous item"
• the general fraction line
• a pair of braille grouping indicators around HK
• the one-cell symbol for "bar over previous item"
• the closing general fraction indicator
• blank cell
• the two-cell equals sign
• blank cell
• the opening general fraction indicator
• a pair of braille grouping indicators around BC
• the one-cell symbol for "bar over previous item"
• the general fraction line
• a pair of braille grouping indicators around JK
• the one-cell symbol for "bar over previous item"
• the closing general fraction indicator

Again this is the transcription of your print example using UEB for technical material.

Does this help?

—Kyle