Customise comment lines on Quotations / Orders (make bold, italic, underline)

Currently when you add a comment line to a quotation / order, it is in standard format/font and blends into the rest of the quotation. Quotations I produce are usually quite long with many items on one quotation/order. I usually add 'Comment lines' to act as headers to split the quotation/order into sections to make it easier for my customer to interpret and understand. At the moment, I use several underscores under the header to act as an underline so it stands out in the quotation. Otherwise it just blends into the quotation. It would be extremely practical if we could make comment lines; bold, italic and/or underline them. This would be VERY useful and would have many applications!