Hello,

Thank you for posting in our community.

Currently, the igx-column-group supports moving, pinning, and hiding features. At this point, we do not provide multi column header resizing. In case you would like to see this functionality implemented in any of the future versions of Ignite UI for Angular, you can log a new feature request in our GitHub repository. This will give you the opportunity to communicate directly with our product managers and development team.

Please let me know if you need any further assistance with this matter.