Below these text boxes will be the heading More Options, and there are two different things that you can do here. If you select “Change the title animation”, you will be taken to a menu select of transitionary effects that you can add to the text you are putting on the clip. This will be in the form of two columns with the left-hand one listing the animation transition and the right-hand one describes the effect.
Without changes made, you simply have the Fade In and Fade Out automatically on it, which should stay in most cases. There are a number of different sections of animations you can choose from, with different ones for single line titles, double line titles, and credits.