@tshering Thanks so much for all the effort you've gone through to help me get to use my Kobo in landscape mode. I should have let you know beforehand that my main interest is in designing ebooks, and I wanted to know about landscape mode because of a poetry ebook I'm working on. Many of the poems have long lines, and they look better with the ereader in landscape orientation.
Though I admire your ingenuity I think the average poetry reader on the street would not be be pleased to open an ebook and find it 'went the wrong way.' I was more interested in finding some hidden method within the Kobo instructions to change to landscape mode.