E-mail Issue with Verizon Header

The Verizon header and menu bar on my verizon e-mail has grown so large that I have no room at the bottom of the screen to type a new e-mail or respond to an e-mail and there is no scroll down bar on the right side of screen.

How do I minimize the Verizon header screen within the e-mail?

How do I retreive the scroll down bar on the right hand side of the Verizon e-mail screen?

The issue is unique to Verizon e-mail on my computer. No issue with other programs. It has to do with the way Verizon e-mail displays.