Showing both To and From fields in emails transferred to folders

[Errol_A]

Good morning
I am new to RoundCube, provided by my email provider, and I would like to configure the email fields which are displayed.  I do not know if I have any skin or special theme installed. In the Inbox, I see Subject, From, Date and Size, while in Draft and Sent, I see Subject, To, Date and Size.  I store both incoming and sent emails in sub-folders according to topic, and would like to see Subject, To, From, Date and Size here.  However, only Subject, From, Date and Size are displayed.  I have trawled through all settings in RoundCube as well as in roundcubeforum.net, but to no avail.  If anyone can help, I would be very grateful.
Regards
Errol_A