When adding a high resolution or high DPI image as a header, you may see a large line break between the header and the main page information.
In order to resolve this issue, use an image editing application to reduce the DPI amount and image resolution of the logo.
Alternatively, use the Export to Microsoft Word functionality in NBS Create v1.6.0 or newer. In this version you can export your specification to Microsoft Word (DOCX) format. Export your specification without any headers or footers and add your logo into the Microsoft Word version.