... increase font size of: message window, radio menu and radio ... replies window.
Message, Radio In and Out Font ... can use DCS Options / System / Messages font scale directly in DCS ... THE SIZE OF THE "MESSAGE" TEXT:
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Edit the ... \Scripts\UI\gameMessages.dlg
The Message window font size is specified ... you want increase radio replies messages edit the file: \Scripts\ ... UI\gameMessages.dlg
The Message window font size is specified ...