Kobo Ereader Basics; Turn Your Kobo Ereader On And Off - Rakuten Kobo Nia User Manual

Kobo eReader basics
Turn your Kobo eReader on and off
The power button is located at the bottom of the eReader.
You can turn your eReader off or put it to sleep when you're not
reading. Both help your battery last longer.
The main difference is that when you put your eReader to sleep
and then wake it up, you go directly back to the last screen you
saw. This could be a page in the book, the Kobo Store, or an area
in your library. If you turn your eReader off, you'll go back to
your Home page when you turn it on again.
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