Hey Benniie!!!
In the Admin->Site->Menu Manager->Main Menu, click on your BlogCategory Menu link and in the parameter, add the following line:
The
count variable is the total items that you want to show in the page and the
intro is the number of items that you want to display its intro text.
For example if you set
count=20 and
intro=10, what you'll get is 10 items displayed with intro text and the remaining 10 title links.
Hope that helped.