If you haven't set a size for these maps on the Setup screen (Inet Mapping Tab) then they default to 400x400 pixels. Maps must be square (at present) to accurately position the track.
Run a prediction.
Connect to the internet.
From the Main screen menu select [Inet Mapping/Internal MapBlast.
The program will download a map that covers your predicted path and draw that path on the map labeling the launch site and the predicted touchdown site.
No fancy features here. No zooming or scrolling.