I was looking at an entry, William Stewart GR5L-VG4. in the CET and decided I needed to do some research. I switched over to the FamilySearch Family Tree because I didn't want to lose the changes if I had to reload the CET. I happened to look at the Recents menu for the FamilySearch Family Tree and saw William Stewart and clicked on the entry and was back in the CET. I did screenshots of the entries. Unless I am watching carefully, I could have continued working on the individual and been in the wrong family tree. The FamilySearch family tree ID for this individual is William Stweart L6M4-WR3.