New features and improvements:

• Add support for PDF layers
• Add support for "--insert-text" and "--insert-cite" command line options
• Enable customization of which columns are shown in the "Insert Citations..." dialog
• Enable customization of the default citation command used by the "Insert Citations..." dialog
• Add dtx tag patterns
• Improve command line parsing

Changes:

• Improve the "message to the mailing list" template text
• Update translations
• Refactor and modernize parts of the code
• Update the libraries for the pre-built binaries

Fixes:

• Fix the limited range of possible guideline positions
• Fix handling of existing \cite commands when using the "Insert Citations..." dialog
• Fix searching in the PDF preview
• Fix selecting text in the PDF preview
• Fix potentially garbled unicode output in the console window

Libraries for pre-built binaries:

• Windows ≥ 10: Qt 6.6.1, Hunspell 1.7.2, Poppler 24.01.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.4.4
• macOS ≥ 11: Qt 6.5.3, Hunspell 1.7.2, Poppler 24.01.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.4.6
• AppImage (glibc ≥ 2.28): Qt 6.5.3, Hunspell 1.7.2, Poppler 24.01.0, poppler-data 0.4.9, SyncTeX 1.21, Lua 5.3.3
• Legacy Windows ≥ 7: Qt 5.15.12, Hunspell 1.7.2, Poppler 24.01.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.4.4
• Legacy macOS ≥ 10.13: Qt 5.15.2, Hunspell 1.7.2, Poppler 21.12.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.4.6

New features and improvements:

• Make the maximum RAM usage of the PDF previewer configurable (and reduce the default to 256 MiB)
• Enable typesetting from preview if no source is open
• Make the PDF paper color configurable
• Add AppImage support

Changes:

• Speed up populating the recently opened files menu (particularly when containing files on slow network drives)
• Disable the typesetting button in the preview if no source is available
• Update translations
• Refactor and modernize parts of the code
• Update the libraries for the pre-built binaries

Fixes:

• Fix crash when closing a source opened after the preview
• Fix crash when killing a typesetting process by closing the source window
• Fix several memory leaks
• Fix the PDF preview of files that are in the process of being changed (e.g., during typesetting)
• Fix focusing of the console when typesetting from the preview
• Fix (potential) non-sequential ordering of PDF search results
• Fix repeated PDF searches with the same search string but different search flags
• Fix blocking UI while performing long PDF searches
• Fix PDF search result highlighting disappearing too quickly
• Fix the display of PDF search results in single page view
• Fix typesetting with symlinked root files
• Fix quotation of paths in the TEXEDIT & MIKTEX_EDITOR environment variables
• Pre-select the ruler unit in the "Edit guideline" dialog
• Fix saving with arbitrary extensions on Windows
• Fix displaying embedded jpg images on macOS
• Fix the look and feel on macOS with Qt6

Libraries for pre-built binaries:

• Windows ≥ 10: Qt 6.4.2, Hunspell 1.7.2, Poppler 23.02.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.3.3
• macOS ≥ 10.15: Qt 6.2.4, Hunspell 1.7.2, Poppler 23.02.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.4.4
• AppImage (glibc ≥ 2.28): Qt 6.2.4, Hunspell 1.7.2, Poppler 23.02.0, poppler-data 0.4.9, SyncTeX 1.21, Lua 5.3.3
• Legacy Windows ≥ 7: Qt 5.15.8, Hunspell 1.7.2, Poppler 23.02.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.3.3
• Legacy macOS ≥ 10.12: Qt 5.15.12, Hunspell 1.7.2, Poppler 21.12.0, poppler-data 0.4.12, SyncTeX 1.21, Lua 5.4.4

New features and improvements:

• Add a ruler with draggable guidelines to the PDF previewer
• Improve preservation of Unicode characters during loading/saving
• Prevent concurrent typesetting in multi-file sources
• Disable "Remove Aux Files" during typesetting
• Add full paths as tool tips in the "Open Recent" menu
• Use native separators (/ or \) in the recent files menu
• Add "Fit to Content Width" to the PDF preview zoom context menu and to the scaling preferences
• Improve support for dark themes (changing the syntax highlighting color palette; fixing the color of the current line when changing OS color schemes; fixing the background color of the screen calibration widget for dark themes)
• Improve interoperability with docstrip by adding support for%^^A ! TeX... magic comments

Bug fixes:

• Fix crash when using the PDF preview zoom context menu
• Fix search results for unsaved .tex documents
• Fix line spacing when (re-)loading a document
• Fix hang when recent files are on (inaccessible) network drives
• Fix bugs when populating the recent files menu
• Fix focus when switching windows from the "Windows" menu
• Fix filtering in the citation select dialog
• Fix parsing BiBTeX @STRING entries
• Fix toggling of items in the "Remove Aux Files" dialog
• Fix quotes smartening after \
• Fix display of ScreenCalibrationWidget on macOS

Misc:

• Update translations
• Update libraries for pre-built binaries
• Modernize and restructure the code to improve quality, stability, maintainability, and the possibilities for future enhancements
• Improve automatic building, testing, and packaging
• Automatically build pre-compiled binaries for macOS ≥ 10.12 and ≥ 10.15
• Improve the look and feel of the pre-compiled macOS binaries
• Improve texworks.appdata.xml
• Add "Keywords" to texworks.desktop

Libraries for pre-built binaries:

• Windows: Qt 5.15.2, Hunspell 1.7.0, Poppler 22.02.0, poppler-data 0.4.11, SyncTeX 1.21, Lua 5.3.3
• macOS ≥ 10.15: Qt 5.15.2, Hunspell 1.7.0, Poppler 22.02.0, poppler-data 0.4.11, SyncTeX 1.21, Lua 5.4.4
• macOS ≥ 10.12: Qt 5.12.12, Hunspell 1.7.0, Poppler 21.12.0, poppler-data 0.4.11, SyncTeX 1.21, Lua 5.4.4

New features and improvements:

• Add support for macOS 11 Big Sur
• Add support for HiDPI screens (e.g., Retina screens)
• Make the text cursor width customizable
• Add support for environment variables in paths to typesetting tools
• Add support for custom shortcuts for quickly changing typesetting tools
• Pre-select *.pdf when the open dialog is called from the preview
• Only reload a file if its content changed (this improves support for network shares, cloud services, etc.)
• Add support for Qt's new Javascript engine

Bug fixes:

• Fix some crashes
• Fix some potential memory leaks
• Fix refreshing of the PDF preview on Windows
• Fix opening links to PDFs specified with relative paths
• Fix the context menu in the PDF preview
• Fix File > Close in the PDF preview
• Fix switching the PDF to fullscreen mode on first press
• Fix resizing of the columns in the template dialog
• Fix running some typesetting tools on macOS (by adding their path to $PATH)
• Fix macOS installer styling
• Work around vanishing menu items on macOS
• Fix the disappearance of several text encodings
• Move resources to (OS dependent) standard locations

Misc:

• Update translations
• Update libraries for pre-built binaries
• Modernize and restructure the code to improve quality, stability, maintainability, and the possibilities for future enhancements
• Improve automatic building, testing, and packaging
• Initial support for Qt6

Libraries for pre-built binaries:

• macOS: Qt 5.15.2, Hunspell 1.7.0, Poppler 21.03.0, poppler-data 0.4.10, SyncTeX 1.21, Lua 5.4.2
• Windows: Qt 5.15.2, Hunspell 1.7.0, Poppler 21.02.0, poppler-data 0.4.10, SyncTeX 1.21, Lua 5.3.3

Bug fixes:

• Fix text selection handling when moving the mouse
• Fix auto-reloading of TeX documents that were changed outside TeXworks

Misc:

• Update translations

Libraries for pre-built binaries:

• Mac OS X: Qt 5.14.1, Hunspell 1.7.0, Poppler 0.85.0, poppler-data 0.4.7, Lua 5.3.5
• Windows: Qt 5.14.1, Hunspell 1.7.0, Poppler 0.85.0, poppler-data 0.4.9, Lua 5.3.3

New features and improvements:

• Add shortcut (Ctrl+Shift+J) to invoke SyncTeX at the cursor position
• Make shortcuts for autocompletion configurable
• Make "Auto-Follow Focus" configurable in the preferences
• Make editor line spacing customizable
• Make console output accessible by keyboard; among other thigs, this makes the console work with screen readers
• Migrate to a more powerful regular expressions engine (e.g. for finding and replacing)

Bug fixes:

• Fix opening empty files
• Fix the highlighting of TeX commands that include non-ASCII characters
• Fix the auto-closing of PDFs with the associated TeXs
• Fix the PDF display on high-dpi screens like Retina displays
• Properly handle "&" for recent files menu
• Fix syntax highlighting in the "New from template" dialog
• Sort interface locales alphabetically in the preferences
• Don't show invalid PDF page sizes in the meta data dock
• Properly show the PDF file size in the meta data dock even for locked or
  invalid files
• Fix the conversion of Lua tables in Lua scripts
• Fix the installation of icons on *nix platforms

Misc:

• Update translations
• Update libraries for pre-built binaries
• Modernize and restructure the code to improve quality, stability, maintainability, and the possibilities for future enhancements
• Improve unit tests and add automated testing on Windows; this ensures better code quality across all supported operating systems
• Discontinue Qt4 support; TeXworks uses the more modern Qt5 exclusively now

Libraries for pre-built binaries:

• Mac OS X: Qt 5.14.1, Hunspell 1.7.0, Poppler 0.85.0, poppler-data 0.4.7, Lua 5.3.5
• Windows: Qt 5.12.3, Hunspell 1.7.0, Poppler 0.85.0, poppler-data 0.4.9, Lua 5.3.3

New features and improvements:

• Implement "Insert Citations..." dialog
• Implement indenting/unindenting by Tab/Shift+Tab (thanks to @fsonner)
• Make synchronization granularity configurable (highlight corresponding character, word, or line)
• Add ability to distinguish identically named files by displaying the respective folders they are in in the window title, window menu, and under "Open Recent"
• Implement "Fit to content width" PDF zoom (which ignores empty space around the text)
• Disable unavailable typesetting engines
• Allow to change the editor font size by Ctrl+Mousewheel (thanks to @timhoffm)
• Improve the detection of spellchecking languages (add ability to search multiple directories and list all results)
• Hide the menu bar in PDF full screen mode
• Rework/expand code completion strings (thanks to @josephwright)
• Add/update syntax highlighting for LaTeX, ConTeXt, Lua, DTX (all thanks to @josephwright), and BibTeX
• Add cleanup-patterns for beamer files .nav & .snm
• Add new/unified icons for typeset (thanks to @timhoffm) and zooming
• Display paper size and file size in the PDF metadata

Bug fixes:

• Fix infinite loop in syntax highlighter (which caused significant slow-down especially for large files)
• Fix underline when spellchecking with syntax highlighting
• Fix "Place on Left/Right", especially on multi-screen setups
• Avoid 'file "" not found' errors when synchronizing
• Fix synchronization while searching in a PDF
• Fix fine-grained synchronization near paragraph boundaries
• Fix the PDF copy menu command
• Fix PDF text selection
• Fix font color reset when searching and using stylesheets
• Fix crashes when working with locked PDFs
• Fix unexpected cursor movement when using a combination of backspace and up/down arrow keys (thanks to @mgkuhn)
• Fix the font in the log parser output
• Fix persistent magnifying glass
• Remove unimplemented PDF menu items cut, paste, clear

New features and improvements:

• Implement handling of links to external files in the PDF preview
• Implement a simple screen calibration widget to allow adapting the PDF preview to the screen's resolution
• Improve responsiveness when opening large documents
• Use old content instead of rendering placeholers after a PDF was reloaded to facilitate seeing changes
• Improve the usability of the "Remove Aux Files..." dialog by letting the user toogle the selection by clicking anywhere on the row
• Add support for the bibliography program "biber" by default
• Allow custom zoom levels in the PDF status bar context menu
• Add a Windows manifest so TeXworks looks more "native" on modern versions of Windows

Bug fixes:

• Fix PDF zoom speed for high-resolution mouse-wheels
• Fix a deadlock causing TeXworks to hang when loading PDF annotations such as links
• Fix crash when changing files outside TeXworks
• Fix crash when syncing from an if-block in the TeX file
• Fix crash when reloading a PDF while text was selected
• Fix enabling of the first/previous/next/last page toolbar buttons in the PDF preview
• Fix the wrong appearance of the PDF magnifier in some cases
• Fix truncation issues and misreported Windows versions in "Email to mailing list"

Bug Fixes:

• Fix "Jump to Source" from PDF context menu
• Fix fine-sync'ing close to PDF line boundaries
• Fix loading of Qt-global translations

Improvements:

• Fix pixel-alignment after zoomFitWindow in continuous mode
• Fix handling of changing scroll bar visibilities in zoomFitWidth and zoomFitWindo
• Allow horizontal scrolling by Shift+MouseWheel
• Update translations

The main focus of this release is a complete overhaul of the PDF previewer, featuring

• Faster rendering
• Major performance improvements at high magnifications
• Continuous scrolling mode — no more abrupt jumps from one page to the next (the non-continuous mode is still available from the View menu)
• Two-pages (spread) mode
• Selecting and copying text out of a PDF
• Going back to the previous view after clicking on a link (by pressing Alt+left arrow)

In addition, several bugs were fixed and support for Mac OS X was improved by adopting Travis CI for building and deploying.