Is there a way for the message panel to scale the mail contents to fit the window?

With the message panel on the right, the contents of the message panel do not scale to fill the message panel.  Instead graphics and text are cut off at the edge of the monitor.  Can you make an option so that the message panel scales the message to fill the window, or is there one that I am missing that will do this?

Microsoft’s Windows 10 mail client makes the messages fit the reading panel.  eM client on the same message, makes the message so big that I can only read a small portion of it and I end up having to scroll both vertically and horizontally to read it.