# pHn_bMustBeUnderlined

This is a read and write property.

This is one of the criteria used to determine whether source text should be converted to a heading in the HTML output. If you set `pHn_bMustBeUnderlined` to `TRUE`, the text in the source document must be underlined in order for HTML Export to consider converting it to a heading. The default is `TRUE`.

To determine whether source text should be converted to a heading, HTML Export also considers whether the text meets the criteria defined by the other parameters of `KVHTMLHeadingInfo`.

See headingCreateType for more information on automatic generation of headings.

For this property, `n` can be heading level 1 through 6.

_FT_HTML5_bannerTitle.htm