Kisslicer brim question

How can I add a brim around the support touching the bed? My design has very little auctually touching the be and there is lots of support for the structure. I am finding that the piece lifts off the bed and I want to add a thick brim to secure it better. Also I use a raft as well. Is this possible? I tried to find the answer online. Thanks in advance.

This other post should help you find the settings for brim.

Also, you might not want to use a raft.