New
#11
Okay, done. Got a warning about conversion into a dynamic storage medium and that I would not be able to start another operating system in future except from this volume.
No idea what that meant, but as I don't have another operating system on this machine, I went ahead and did it. Now all the volumes (partitions?) have a new color bar above them, in olive green.
Will do the test backup-and-restore next, followed by a full image backup. Will report back after that is done.