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Allow changing the search order when clicking on items in the Tag browser (Preferences->Look & feel->Tag browser->Hierarchy and searching).Content server: Use the chapter title as the base bookmark name when creating new bookmarks.Conversion pipeline: Add support for !important when flattening CSS rules.When sending books by email to the Kindle and PocketBook email delivery services use random subject and filenames consisting of simple English letters to try to workaround various bugs in their email processing code.Tag browser: Fix error if a User category contains a reference to a deleted custom column.E-book viewer: When displaying highlights do not group highlights from different chapters when the chapter titles are identical.Comments editor: Workaround for Qt inserting invalid font-weight when converting a paragraph to a heading.Template language: New functions strcasecmp() and to_hex().Tag mapper: When specifying the replacement tag allow completion from the tags in the currently open library.Do not show the virtual libraries tab bar when no virtual libraries are present.E-book viewer: Ask for confirmation when deleting a custom highlight style.When running calibre with the -with-library command line flag and calibre is already running, switch to the specified library in calibre.Kobo driver: support the new Kobo Clara 2e.Note that you will have to resize it once after updating to 6.6.1, after which the size will be remembered. Version 6.6.1 fixes a regression that caused the Edit metadata window to not remember its last used size.Edit book: File list: Fix pressing Tab key while renaming a file not starting the rename of the next file.
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Workaround for Amazon's email delivery service not reading metadata from inside ebook files.Font subsetting: Fix :first-line and :first-letter pseudo classes not being handled correctly.Content server: Fix jumping to locations such as bookmarks not working on iPhone/iPad running iOS >= 15.Edit book: Fix an error when processing books that contain comments inside unknown CSS rules.EPUB Output: Fix converting a document with obfuscated fonts to EPUB 3 not working.Edit book: When right clicking on HTML files in EPUB 3 books, allow marking them as the Table of Contents (NAV document).
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Then, when searching the Tag browser, press Ctrl+Alt+Shift+F to restrict the displayed books. To use enable the two Preferences: "Preferences->Look & feel->Tag browser->Hide empty categories" and "Find shows all items that match".
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