New features
Allow auto scrolling through the list of books by pressing the X key or right clicking on the cover browser
Closes tickets: 1917634
Useful to have a "slideshow" of book covers. The speed of scrolling can be controlled in Preferences->Look & feel->Cover browser
E-book viewer: Speed up first time open for EPUB files with lots of styling
E-book viewer preferences: Allow searching for keyboard shortcuts
Edit book: Allow editing WEBP images
Various improvements to the template language, see
https://www.mobileread.com/forums/showthread.php?t=337573 E-book viewer: Show the current progress percentage in the bottom bar of the viewer controls. This can be customized in the viewer preferences under Headers and footers
Closes tickets: 1921610
E-book viewer: Add an option under Preferences->Miscellaneous to not restore open panels such as Search, Table of Contents etc on restart
Closes tickets: 1921689
When exporting highlights as text or markdown also output top level chapter titles
Allow downloading metadata from amazon.se
Closes tickets: 1922327
Preferences->Tweaks: Allow specifying that calibre should open the book details window when double clicking on a book
Closes tickets: 1922591
MOBI Output: Convert WebP images to PNG so they work with Amazon's software
Closes tickets: 1922341
DOCX Input: When converting embedded fonts, replace spaces in the filename with underscores to keep the execrable epubcheck happy
Closes tickets: 1921793
E-book viewer: Selection bar: Add keyboard shortcuts for all buttons. Hover over a button in the bar to see the shortcut
Bug fixes
FB2 Output: Fix a regression in calibre 5 that caused paragraphs containing only non-breaking spaces to be removed
Closes tickets: 1924232
Metadata comments editor: Fix setting block alignment destroying other block level properties
Closes tickets: 1924187
E-book viewer: Fix margins not being adjusted immediately when preferences are changed
Edit book: Upgrade book internals: Fix skipping the NCX removal dialog not remembering the chosen option
Closes tickets: 1921604
Conversion: When specifying a line-height do not apply it to the <html> tag, as it is pointless and causes the execrable epubcheck to complain
Closes tickets: 1922570
E-book viewer: Improve scrolling behavior when extending the selection using keyboard shortcuts
E-book viewer: Fix read percent for HTML files that are rendered in a single screen being 0% rather than 100%
E-book viewer: Highlights panel: Do not expand all sections when adding/deleting/modifying highlights
Closes tickets: 1924598
CHM Input: Fix a regression in calibre 5.0 that broke opening of some files that dont specify a character encoding
Closes tickets: 1922503
EPUB2 metadata: Read ISBNs in identifier elements without schemes if they are valid ISBNs and no properly identified isbns are present
Update Amazon metadata plugin for changes to amazon websites
Closes tickets: 1922309
Edit book: Fix detection of class names containing hyphens/underscores
New news sources
Los Danieles – Columnas sin techo by CAVALENCIA
Improved news sources
New Scientist
Irish Times
1843
The Straits Times
https://calibre-ebook.com