When reading a lot of text, I usually scroll about a page at a time and I scroll once I've read about 80% of the page. I don't have text constantly moving aroun

When reading a lot of text, I usually scroll about a page at a time and I scroll once I've read about 80% of the page. I don't have text constantly moving around and breaking my concentration. Rather than this, I'd rather just have a "80% screen down" scroll option.