We are able to control the formatting of highlighted reference fields in Word.
CMD:
XML
<Cmd case="BaseExtensions:change-reffield-format" Letterformat="xx" Mergeformat="xx"/>Parameters:
Letterformat
This controls the letter formatting of highlighted reference fields (see image below).
Can be Upper, Lower, Caps and Firstcap
Mergeformat
Optional. True or False. Toggles enabling of the MERGEFORMAT switch.
These settings are controlled using above command:

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