Dear Abirami,
thank you for your reply, your suggestion works and now I can see in the print preview that all the columns fit in one page. My issue now is that I am trying to set an horizontal page break but the page break does not seems to be set when I view the document in print preview or in the page breaks view. This is the code I am using:
sheet.PageSetup.PrintArea = rangePrintArea.AddressLocal;
sheet.PageSetup.Orientation = ExcelPageOrientation.Portrait;
sheet.PageSetup.FitToPagesTall = 0;
var cellPageBreakRange = sheet[89, 1, 89, 1];
sheet.HPageBreaks.Add(cellPageBreakRange);
Thank you in advance for your help.
Kind Regards
Filippo