So, basically I want to send a campaign which is an HTML email.
Which results to no option in adding preview lines straight to the box.
And when I searched on google, I found this info:
But how do I actually implement this?
So, let’s say I want to use “Welcome to my team” as a preview line in an HTML email.
Where should I add this text in the tag mentioned in the picture?
Also where should I use this tag in the HTML email.
Thank you 
Hey
Thank you so much for reaching out for help with adding a preview text to your html email template. The code below is what you will need to add preview text. This code should be added immediately after the opening <body> tag of your template.
<div style="display:none; font-size:1px; line-height:1px; max-height:0px; max-width:0px; opacity:0; overflow:hidden;">
Insert preview text here.
</div>
Import a Custom HTML Template
Hope this helps!
Hello!
I'm doing a plain text email and I used that code to add the preview text. Now, my preview text is short and the rest of the email text follows, but I would like only this small preview text to appear. Is there a way for only this text to show?
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.