From: http://pubhtml5.com/qa/where-to-change-page-shadow-and-alpha-width-of-electronic-publication.html
Customize page shadow for your digital publication made by PUB HTML5 with several simple steps.
2. PUB HTML5 is a fantastic flipping book publication
creator to create interactive electronic publications
from PDF, MS Office file and images. In addition,
PUB HTML5 provides a simple way for users to
customize the page shadow and alpha for your digital
publications.
3. • Login and Import FileStep1
Create an account on website or software,
and then login to continue importing file
to digital publication. Anyway, you can
customize import settings before you
convert file to flipbook.
4. • Custom Settings – Page ShadowStep2
Click tab “Custom Settings” and then enter into
“Advance Setting”, and then get page shadow
configuration with ease.
5. • Customize Page Shadow SettingsStep3
Start to change left page
shadow width and alpha
and right page shadow
width and alpha of html5
page turning book.
6. • Check Page ShadowStep4
Then click “Apply Change”
to save the changes and
check the differences
between different page
shadow width and alpha.