Note 103: See the section “Align and the Explicit* Properties” in Chapter 7 for more details on these new Delphi 2007 properties.
As the blog post title mentions, this note is in a section covering backward compatibility. If you work on a form in Delphi 2007 and later reopen it in an older version of Delphi, the new Explicit* properties that Delphi 2007 might add to the DFM will cause you some trouble...
This blog post is part of my "113 Delphi 2007 Handbook Notes" blogging project, to promote my new Delphi book.