To view the data file supplied with the project, load it into the Data File Tools (Technology Preview) IDE:
Note that the File Details section is populated with values; these are taken from the file header of the .dat file.
The contents of datavseq.dat are displayed.
Each record is unformatted; that is, it is shown as one continuous line of text. Records are easier to view and edit if they are formatted; for that, you need to create and apply a structure file.