HTML Message by News Letter

Dear Team,

I am working with news letter for sending emails ti email group and quite understand the working process but now i want to send HTML message through News Letter but when i paste my html code in message field of newsletter it treats that code as a text because it is not a code field and send exact code as text on mail.

please guide me how can i achieve it ?

i have got a video in which there is an option of html editor but i am unable to find it in version 11.


Easy way is to change to HTML Editor the field used for description