So, you launch NimPro, and get a largely blank screen.
To do useful work, you need to load a NIMAS fileset. NimPro is not an editor for creating a document from scratch.
Use File, Open (Control-O) to open a file.
If you do not know what a NIMAS file is, please refer to the Vital Background Information.
Once you load a NIMAS file, the NimPro screen displays information in three columns: