SAP Marketing Cloud How to add consumers to a target group?

Hi,

In SAP Marketing Cloud we need the option of adding consumers manually to a static target group.

I have two questions?

1. If I have a set of individual customer ID's, can I import them some how from a xls or csv file into an empty target group? Can this be activated and where can I find this option?

2. If I have to add them one by one using the input help (Target group - Accounts and Contacts - Add), is it possible to change the columns? I would like to add the account ID in the list.

Kr.

MJ