I usually use Publisher on a larger second screen. Today, I unplugged it to work elsewhere and when I opened my .afpub document it didn't appear on the Mac's screen at all. With some fiddling, I got to show up on the Mac screen but it opened at the size of the external (larger) screen so all edges of the document were off-screen. Is something about "last screen used" being retained and Publisher isn't checking either the presence or size of the when it opens a document.