When configuring an object of a profile there are currently 5 columns visible in the "Object Fields" section:
- Field Group
- Display Type
To check whether any field has the "Span Columns" set to true or false, you have to click on each field and verify the configuration in the "Display Type Information" section.
Having this information available directly in the "Object Fields" section (as 6th column) would increase the productivity of profile configuration and maintenace a lot (see attached image).