Where can I delete the text 'Back to top'

Where can I delete the text 'Back to top'

Where do you see that text?

It's standing standing on every page example martijnnijhoff.nl/index.php/component/k2/item/18-strategie

Some setting in k2 , if you can not find it you can hide it by adding this css to bottom of template_css.css:

.itemBackToTop{
display:none;
}