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).

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'.

Tag browser: When searching the Tag browser allow also filtering the book list to show only books that match one of the categories currently shown in the Tag browser.

Book details: allow displaying multi-valued categories such as tags on separate lines via Preferences->Look & feel->Book details.

Version 6.7.1 fixes a regression in the previous release that broke the delete specific format from book function.

Edit book: Preview panel: In dark mode when all of the background/foreground/link colors are set to 'No change' do not render the book using dark colors.

Content server: When adding books, run all file type plugins before reading metadata.

E-book viewer: Fix copy to clipboard not ignoring text from elements that are marked as non user selectable.E-book viewer: Fix a regression that broke adding of new lookup sources.Book list: Allow changing column widths via a dedicated dialog by right clicking on column headers.E-book viewer: Ask for confirmation when creating a highlight that will overwrite existing highlights.Tag browser: Allow removing format from selected books by right clicking on the format in the Tag browser.Template language: A new 'Python template mode' which allows using arbitrary Python code in templates.

Calibre mac to nook