Quote:
Originally Posted by BAD18
I want to make my Calibre column from Published to "Yes/No". Pdurrant I was able to clear the Published name off but I don't know how to add "Yes/No" so I'll know if I've read the selected book.
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As theducks says, you can't change existing columns, but you can certainly add a column. If you haven't already added such a column, then just add it.
calibre/Preferences/Change calibre behavior/Add your own columns/Add custom Column
Set the Column type to "Yes/No" and add your preferred name for the column.