To enable the exit intent popup, simply go to:
Newsletter Settings -> Exit Intent -> Enable Exit Intent -> Yes
The customization options are very similar to the newsletter popup. Select which design option you would like, behaviour, design and styling as well as user experience.
You can select if you would like the user's experience to be single or multistep. The content can be fully customized for every design in the Content -> Block section by simply searching for the weltpixel_exitintent_newsletter identifier.
Same as for the newsletter popup, you will have two blocks for each design; here, you can fully customize the content of your blocks.