Unread e-mails highlighted grey or white

Hi community,
In my old version of K9 (5.600) unread e-mails used to be highlighted in grey or white.
Also in the overall folder view all unread e-mails across all folders used to be displayed with numbers of the unread e-mails.
Can I setup the new version of K9 to function like the previous one ?
Thx, blub4747

By default the text is bold for unread messages. In the following screenshot the 4th and 5th message on the list have been read, the others are unread.

There is a setting to change the background color for read messages which looks like this:

You can see unread message count on the folders list

Screenshots from 5.726 but I believe this is all the same right up to the current version (5.740)