How to change thumbnail background color in a flip book?

(free download here) to publish flip book, you will get a thumbnail which is created by the software

automatically. In the meanwhile, you are allowed to change the thumbnail background color to match the book style in the Neat Template.

See how this is set:

1. Open the software and import PDF file;

2. Choose Neat Template and customize the flip book with different settings;

3. Search "Thumbnail Background Color" and select a color from the color library;

4. Save all the settings and choose output type to publish flip book.