[Plugin: NGG NivoSlider] Change slider slug/caption

There is a black bar at the bottom of my slider that is like a permanent caption that seems to be automatically using the name of the page for the white words. I would like to change this wording to something else. In the short code I tried adding htmlcaption=”MyWordsHere” but that didn’t change anything. Can you tell me how to either change or eliminate this permanent black bar with white words? Thank you.