Steven Zahm@ Wolfgang
Navigate to the Connections : Templates admin page and activate the Default Entry Card template. Next, click the Customize button for the Default Entry Card template.
The page will reload with the Customizer on the left and a preview on the right. Click and entry name in the preview. Any name will do, it does not matter. The preview will refresh displaying the single entry profile detail view. Choose the options to display in the Customizer and Publish.
Exit the Customizer and then activate the Slim Plus template. The result will be as it is now, but with the changes you made displayed when you open an entry in a new window.
This works in this case because the Default Entry Card template is being used to display the single entry profile detail view.
Hope this helps!