To start with any project with Inventu Viewer+ Studio, the first action is to create one or more Recordings of the host application you will be working with.
To create a recording, please refer to Creating a Recording in the Screen Recorder and Viewer help.
The next step is to Import the Recording as a new Application, naming the application in the process.
Note that if you are planning on modeling and generating an ASP.NET User Interface based on your screen recordings, it is a good idea to read the help for the E-Migration UI Generator before working on your screen definitions...
Once you have imported your application, you can work with the Properties of the main objects, Definition(Project), Screen Groups, Screens, FieldMaps and Fields.
Remember to Save your application definition, the Ctrl-S key is an accelerator, as with other applications, for saving your application.