Calibre 100%

: If you need to extract all text from a book into a single long file, it is often easier to convert the book to .txt or .rtf format first rather than trying to "select all" in the viewer.

: While standard fields are easy to bulk edit, long text fields (like Comments) can be trickier. You may need to use Regex (Regular Expressions) within the bulk metadata edit dialog to find and replace specific formatting or repeated text across many books. Calibre

Managing "long text" in typically refers to adding custom metadata fields for detailed notes, chapter descriptions, or extended commentary that doesn't fit in standard fields like "Title" or "Tags." Creating "Long Text" Custom Columns : If you need to extract all text

Give it a (e.g., mynotes ) and a Column heading (e.g., "Notes"). Restart Calibre to see the change. Tips for Working with Long Text Managing "long text" in typically refers to adding

: You can make these fields visible in the main book details pane by navigating to Preferences > Look & Feel > Book details and checking your new column.