How can I assign/remove a tag to/from a contact?

Steps

1. Use “Quick search“ or “Extended search“ to filter for the contact
2. In the displayed contact detail section „Tags“, either …
   1. select a „Category“ from the drop-down and the desired tag to assign it to a contact OR
   2. click the ‘minus’ icon for each tag you want to remove from this contact
3. => As soon as the tag has been assigned/removed, this change has immediate effect on the system.