While in the "Master View", click the "Insert" menu and select "New Title
Master". This particular design template you are using didn't come with a
Title Master. You need merely insert one. If you want to continue using
this design for future needs, make your Master/Title design changes, close
out of the "Master View", click "File", "Save as", click the "Save as type"
dropdown and select "Presentation Template" (or "Design Template", depending
on your version). This will take you to the "Templates" folder where you
can give it a name. Then you will be able to reuse it as needed in future
presentations.