Fix active tab not easy to distinguish in dark mode.

Comic Input: When converting grayscaled PNG images to PNG ensure output images are stored as indexed PNG.

DOCX Input: Do not ignore images that are present as fallbacks for a word drawing object.

E-book viewer: Fix images embedded inside SVG tags not available for viewing in a pop-up.

E-book viewer: Fix a regression that caused incorrect highlight collision detection in some books.

A new tweak in Preferences->Tweaks to control what program is run when clicking on URLs in calibre.

Edit metadata dialog: Use both a colored border and an icon to indicate errors in line edits.

Metadata download: Allow specifying rules to transform publisher names in addition to author and tag names.

Edit metadata dialog: Add buttons to pop up the category editing windows easily.

Can be controlled via an option in the EPUB Output section of the conversion dialog

EPUB Output: Do not shrink images to fit the screen size by default, as modern readers do this themselves well enough.

Works even with books not in the current library.

calibre:// URL scheme: Add support for a new type of URL that pops up the metadata of the specified book in a new window.

They can be set by right clicking the author/tag/etc. The links show up as click-able icons in the book details panel.

Allow adding external links to tags, series, publishers, etcetera in addition to authors.

Calibre pocketbook