Is there an instruction manual?

Yes. The tutorial is built into the app itself. When you install the product first time there is a 'Tutorial Stack'. That contains about 40 cards that will teach you the essentials. There are also online videos (on this site, the Video tab). Finally, if you have for some reason deleted the Tutorial Stack, you can always restore it. Just to go Settings/Backup and Restore, and select 'Restore Tutorial'.

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