You can custom a unique toolbar for your flipbook in a following manner:
Step1. Login in, click on the "MY PUBS" option on the left bar, and select the publication you're going to design.
Step2. Click the "General Settings" button.
Step3. Go to "Advanced" tab and choose the "Toolbar" option.
Step4. Now you can customize the toolbar, like change background/button color, show or hide buttons etc.
Step5.Click the "Save and Close" button when you're done.