The text element is actually the output of HTML. In HTML you have two elements that separate lines of text
& . The
element (paragraph) is the default and puts what appears to be a 2-line gap.
Perhaps what you want is to use the (new-line) element.
To do so, click the HTML icon on the left of the toolbar to the text-element. In the HTML code, put your cursor at the point in the text where you want to create push the text to a new line without inserting a gap and type
Let me know if I have not clearly explained myself...