Hello Antonio, 

Thank you for contacting Infragistics. To get a sense of how the UltraGanttView prints you may visit our online documentation:
https://ko.infragistics.com/help/winforms/winganttviewprintdocument-print-preview-with-winganttviewprintdocument

Features provided while is at a minimum, you cannot decide which columns get to be printed through the UI. I recommend submitting a new product idea. 

You can suggest new product ideas for future versions (or vote for existing ones) at <https://ko.infragistics.com/community/ideas>.
Submitting your idea will allow you to communicate directly with our product management team, track the progress of your idea at any time, see how many votes it got, read comments from other developers in the community, and see if someone from the product team has additional questions for you.
Remember when submitting your idea to explain the context in which a feature would be used and why it is needed as well as anything that would prevent you from accomplishing this today. You can even add screenshots to build a stronger case. Remember that for your suggestion to be successful, you need other members of the community to vote for it. You can also link back to this thread for additional details.

Let me know if you have any questions.

Michael DiFilippo
Software Developer
Infragistics, Inc.