Do-more's documentation is different than DL in two big ways: 1) the potential number of things that can documented is *huge*, and 2) you aren't documenting a memory location, but actually anything that can be referenced in the program, like a cast or structure field. Trying to blow out every possible documentable thing would have resulted in millions of lines in the editor, which is simply unmanageable, so we went to a more record-cetric approach for Do-more. As you've now observed, the downside is that by default there is nothing there.
To make it a little friendlier, we added the concept of virtual records. Any time a documentable reference is used in the program, we add a virtual record to the database. Virtual records are indicated by the '*' next to the element reference. We also made it possible to add virtual records through the "Add" option, which is what you've done. The reason they aren't there when you come back in is because the records don't actually exist in the database. At first glance it would seem pretty easy to create empty records instead of virtual records, but emptying the record is what tells the database system to delete the record.
It isn't a great workaround, but you could so something like using the "Add" option in single record mode, setting the Nickname field to something like Dummy0, checking the "Keep record content..." option at the bottom, and just keep hitting the "Add Record..." button to stream down through memory. That will create real records and initialized them to Dummy0, Dummy1, Dummy2, etc.