Note: These are available to Designer Pro+ from 20.5 onwards.
Headers are Smart layouts that position themselves at the top of the page, and make themselves repeating.
They will also, where possible, try to keep the content set within so you can swap them out for another header and it won't lose your text or logo information. This does mean rather than delete and insert a new one, simple insert a new one and it will replace the old one automatically.
You can find these by going to Insert > Headers.
Please note that these headers don't work well with documents that have mixed page sizes.