Thanks - nice try but I've already been there.
This is really weird. If I save in landscape mode it should open in landscape mode.
I can save a page in MS Publisher in landscape mode and it opens in landscape mode, but WordPad in Win10 will not.
I can save a page in Word as a doc in landscape and it will open as a landscape in Word or Libre Office but not WordPad (wordpad doesn't really like doc files as the formatting confuses it). So I saved it as .rtf, opened in WordPad and it opens in letter mode.
I think the problem is WordPad.
Notes