You can speed-up headline or subheadline writing by copying selected content from body to headline/subheadline.

In version 1.5

Select some text in body, and then on the Type menu, point to Fill with, and then select what you want.

In version 1.4 and older

Select some text in body, and then call the ArticleCopyTxtTo("head") or ArticleCopyTxtTo("subhead") system script.

You can assign such script to a shortcut key, menu command or custom icon.