Hi again Jerzy,
this is unfortunately an intended behavior, while showing the compact list of emails, you can only view a certain number of columns. You can change the order in which these columns will be shown, just move the “to” upwards or downwards in the list. But unfortunately all fields can not be viewed in the compact list.
I understand that in compact list I can view not all columns, but I don’t understand why To replaces MessageSubject. This is very common to store received and sent messages in folders grouped for example by project or customer.
Hi again, unfortunately it is not possible to view both of these options, the list does not contain enough space for all these options to be displayed.