At the end of the slideshow, tell something to your audiences by add scrolling credits to it. It's easy and funny.

Step 1: Click the first button of toolbar above "Storyboard", and select "Add photo" or "Add blank slide" according to what you need to add your credits on. If add a blank slide, you can choose to add a single color like all white slide or all blank slide, or add a three color mixed with certain gradient direction.

Step 2: Move to Time Line view to get a better control.

Step 3: Move the timeline slide bar to where you want to add your caption. Then double click on the text track above the thumbnails and a "caption edit" window will pop-up. Add your text in that box, and set the font family, size, color, etc. as you like.
 
Tip: Drag the text to anywhere directly in the preview frame.

Step 4: Now, it's time to set caption effects as follow:
1. Effect Action: "Entrance", Type: "Fly Entry", Duration: 1 s, Direction: 90;
2. Effect Action: "Emphasis", Type: "Color Wave", Duration: 1 s;
3. Effect Action: "Exit", Type: "Fly Exit", Duration: 1 s, Direction: 270.
 
Tip: Set the duration of effects to make it fit to your slideshow.

Step 5: Repeat the steps above to add multiple captions.

Step 6: Click play button to preview the effects of your scrolling credits.