How to show the email message body in the email templates in Designer?


Unknowingly, I have closed the email body in mail templates present in Designer. I tried view the Default layout but no luck.

I am now not able to see the email body in the designer due to which I am not able to make any changes in the body. I can see only till Subject.

Can any one help me out how can the email body block will be displayed back in the email templates present in Designer?

Thanks in Advance.!