Theres no way currently for the sheet to output multi line data without it being sent to the general channel. As others have suggested the way around this is to start any new line in any section of the NPC section of the sheet with a "/w GM" to ensure that any additional data is also whispered to the GM. Hopefully, with the ability to do some basic formatting of the output this can be avoided in the future without having to add extra spaces or commands to something you enter on the sheet but for now the options are leavie t all on one line, use spaces, or start any lines after the first one (where you have used a carraige return) with "/w GM"