Diane Sawyer signed off as anchor of ABC's "World News" last night.  She told viewers that it has been wonderful to be the "home port" of the network's news team each weeknight.

She will be replaced next week by David Muir.

On Wednesday's newscast, she chatted briefly on the set with Muir and took viewers on a behind-the-scenes tour pointing out people who worked at "World News."

"He is my friend and you are in strong and steady hands," she said of Muir.

Sawyer isn't retiring. She will move "down the hall and up the stairs" to a reporting job.

It is expected the she'll do big newsmaking interviews at the network, a bigger role now that Barbara Walters isn't working regularly anymore.

Here's the sign off from last night.

Photo by Anna Webber/Getty Images for Can-Do Awards