Calibre -

: 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.

If you need a second large text area similar to the default box, you can create a custom column: Go to Preferences > Add your own columns . Click the "Add custom column" button (+). Set the Column type to "Long text, like comments" . Calibre

: 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. : While standard fields are easy to bulk