You can "print" your vi. When you do that, you have the option to save it instead as an html or rtf file. LabVIEW will create images of your diagram that you can use for your user manual.
Also, you can simply select your diagram or part of the diagram using the "Position/Size/Select" tool, copy it and then paste it on your word document, like any regular cut and paste. It will paste as an image. If you want, you can paste the image in another application directly like Paint or Microsoft Photo Editor, so you can modify it accordingly to your needs.
Best regards;
Enrique
www.vartortech.com