XF 1.4 How can I do this?

[JamesBrown]

Is this welcome block a regular notice? I would love something similar. I understand I can put a picture in a notice via html but how has he got the sign up overlay on the left. If someone could show me how he has managed this I'd appreciate it, thanks.

NB; I did drop a line to the site owner but he's not got back to me yet.

 

[Allan]

Example: https://xenforo.com/community/threads/notices.18390/page-12#post-276946