Why would you keep source formatting when copying slides from one
presentation to another?
Some presentations have a unified look and feel. If you copied a slide with
a different look and feel, the copied slide would look out of place. In
this case, you would want to have a copied slide match the formatting of
the new document. However, not all slides conform to a unified look and
feel. Additionally, parts of a slide show might have their own look and
feel. I could imagine a slide show with three parts, each their own
particular look and feel. Now, imagine that those slides were coming from
three different presentations. In that case, keep source formatting would
make sense. Additionally, some slides are carefully designed to have the
information shown in exactly the right place. Applying a different master
might completely mess up those slides.
--David
--
David M. Marcovitz
Microsoft PowerPoint MVP
Director of Graduate Programs in Educational Technology
Loyola College in Maryland
Author of _Powerful PowerPoint for Educators_
http://www.PowerfulPowerPoint.com/