Number of entries in Header Highlight Content does not change

Hi Support Forum, I tried to change the number of entries in the Header Highlight Content area of the Parallax Frame theme (free). Right now it has 5 (one on top and 4 in a row below). I want to change it to 9 (for example). But this does not work. When I change to 9 (in the "no of head. high. content) nothing happens. Still 5 entries and also (in the menu) only 5 pages to choose from. Any suggestions? Link: http://gaerten-von-venedig.de Very best Norbert