Once you click the Nexus button within a report, you'll be brought to page 1 of the report.
After cycling through the page options at the bottom, live editable form lines will appear for you to add information. These can be multi-user edited.
Information can also be imported from either Public records if they are available, or through the inspection page in Mobile
In the upper right hand corner, users involved in the report, and your export options (including MISMO) are present.
To learn more about the inspection page in mobile, click here.