Here is a common element that really does not get much attention. Note the “(cont)” at the end of the header.

It is the same font, same color, same size as the rest of the headline. But it really is not a part of the headline content. When I need to add this to a presentation header I do a little formatting like this

The additional item is now non-bold and several font sizes smaller. It conveys the needed information (that this is the same topic continued onto another slide), but is less obtrusive and does not compete with, or alter the header message.

– Troy @ TLC