I can see only one line in email inbox, even changing preferences to more than one

joseph_sp wrote:

Mail in MacBook Pro (Catalina 10.15.6) shows only one line, despite I changed preferences to more

It is unclear which View you are using in Mail...

Try changing from the drop down Mail>View>Show Column Layout and back again

Change Viewing preferences in Mail on Mac - Apple Support

joseph_sp wrote:

Thanks!!! It works

Good computing joseph_sp !