I have a Lightning Record page that has a section with a case page layout. When I retrieve the metadata for the Flexipage, the markup for the section with the page layout looks like this:
<flexiPageRegions>
<componentInstances>
<componentName>force:detailPanel</componentName>
</componentInstances>
<name>main</name>
<type>Region</type>
</flexiPageRegions>
Where is the layout used in this section defined? I did a find across files for the layout name and can't find anything that looks promising. Does it perhaps inherit from an org setting somewhere - does setting the layout used have to be a manual step (this is a valid answer, but looking for confirmation)?