First go to Preferences | Change calibre behavior | Plugins, then expand the Device interface plugins section and highlight the KoboTouchExtended line and click the Customize plugin button.
Take a note of ALL fields listed in the Fields for bookshelves box. User defined columns start with a # symbol, calibre default fields don't.
Select cancel twice to return to the main preferences screen,
Nos select Interface | Add your own columns to see all the calibre columns, both default and user defined.
Select a column being used for your shelving and then the blue ! mark. This will show you the definition of that column. Ypu want to ensure that the columns being used are of type Comma separated text, like tags, shown in the tag browser.
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