Quote:
Originally Posted by Horus68
If you copy a book, using Calibre right click on books, from the "Library 1" (with custom columns) to the "Library 2" (a clean library with no custom columns) the values of the custom columns are cleared for the book copied.
So no information (custom columns values) will be handled to library 2.
Books will have "calibre:user_metadata" (and the available options for each custom fields) but with empty values.
Non custom columns will have their values intact.
Not a pretty solution but an effective one to hide the values on each book to give to others.
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That is not quite true: Calibre will ASK if you wish to ADD those columns. You can decline
I don't remember if this persists on every time you transfer IF, you decline. (all my Libraries that I do this , match columns (lookup names)