There are currently three types of Text Frame export.
1, SVG, is the default and produces the most accurate selectable / searchable rendition of your text.
2, HTML, not as accurate as the SVG.
3, PNG, the content of the Text Frame is converted to a PNG.
For scrolling Text Frames, simply allow the Text Frame to have over set text. We also support the DPS type anchored Text Frame in a rectangle.