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New on CTAN: chempid
by CTAN Announcements 13 Mar '26

13 Mar '26

Roel Raike submitted the chempid package. Version: 1.0.0 License: mit Summary description: Draw Piping and Instrumentation diagrams using TikX via PGF Announcement text: -------------------------------------------------------------------------------- A humble LateX package that allows you to draw Piping & Instrumentation Diagrams (P&ID) or block diagrams quickly and efficiently. It contains pre-built assets in pgf to create P&ID drawings. We noticed that, with the diminishing compile time on Overleaf, it became increasingly difficult to use TikZ to this end. Therefore, we chose for pgf because it is faster to compile than TikZ objects. The objects themselves have been made in accordance with the ISO 10628-2 standard. -------------------------------------------------------------------------------- This package is located at https://mirrors.ctan.org/graphics/pgf/contrib/chempid More information is at https://ctan.org/pkg/chempid -------------------------------------------------------------------------------- Thanks for the upload. For the CTAN Team Manfred Lotz CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs .

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CTAN update: quantum-chemistry-bonn
by CTAN Announcements 13 Mar '26

13 Mar '26

Christian Selzer submitted an update to the quantum-chemistry-bonn package. Version: 0.2.0 2026-03-12 License: lppl1.3c Summary description: Use consistent typesetting for quantum chemistry related software Announcement text: -------------------------------------------------------------------------------- We are pleased to announce **quantum-chemistry-bonn v0.2.0** - a lightweight LaTeX package designed to streamline the formatting of quantum-chemistry documents. Instead of manually typing program names, method labels, or colored highlights every time, **quantum-chemistry-bonn** provides a single, centrally maintained style file that automatically formats. With the new version now acronyms for common quantum chemistry terms. Additionally we fixed some minor mistakes from the previous version. **Download quantum-chemistry-bonn v0.2.0** from CTAN and simplify your QC writings today! -------------------------------------------------------------------------------- This package is located at https://mirrors.ctan.org/macros/latex/contrib/quantum-chemistry-bonn More information is at https://ctan.org/pkg/quantum-chemistry-bonn -------------------------------------------------------------------------------- Thanks for the upload. For the CTAN Team Manfred Lotz CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs .

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New on CTAN: onlinebrief24
by CTAN Announcements via ctan-ann 13 Mar '26

13 Mar '26

Francesco Luciano submitted the onlinebrief24 package. Version number: 2026-03-10 License type: lppl1.3c Summary description: Class for DIN 5008 type-B business letters for use with onlinebrief24.de Announcement text: ---------------------------------------------------------------------- onlinebrief24 — LaTeX document class for DIN 5008 type-B business letters based on KOMA-Script scrlttr2. Layout and margins are calibrated for onlinebrief24.de, a German online postal service that prints and mails letters on behalf of the sender. Features: - DIN 5008 type-B layout with address window zones, fold marks, and dimension markers (guides mode) - "modern" option with header/footer and 8 color schemes - Configurable document language (lang option, default: ngerman) - Multipage support (overlays confined to page 1) - Mandatory field validation for return address and recipient - pdfLaTeX, XeLaTeX, and LuaLaTeX support with font fallback (Arial → TeX Gyre Heros) Location: /macros/latex/contrib/onlinebrief24 License: LPPL 1.3c ---------------------------------------------------------------------- This package is located at https://mirrors.ctan.org/macros/latex/contrib/onlinebrief24 More information is at https://www.ctan.org/pkg/onlinebrief24 ------------------------------------------------------------------------ Thanks for the upload. For the CTAN Team Erik Braun ------------------------------------------------------------------------ CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs

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CTAN update: graphicxpsd
by CTAN Announcements 13 Mar '26

13 Mar '26

Munehiro Yamamoto submitted an update to the graphicxpsd package. Version: 2.0 2026-03-01 License: mit Summary description: Adobe Photoshop Data format (PSD) support for graphicx package Announcement text: ---------------------------------------------------------------------- ## Major Updates in `graphicxpsd` v2.0 * **Transition to `expl3**`: Completely rewrote the package core using the modern LaTeX3 (`expl3`) interface, improving maintainability and namespace cleanliness. * **Modern Option Processing**: Replaced legacy option handling with the `l3keys` module for robust and flexible key-value processing. * **Native Shell Escape**: Removed the dependency on the external `shellesc` package. Now utilizes the native `expl3` function (`\sys_shell_now:e`) to execute external commands safely. * **Smart Engine Detection**: Implemented the `l3sys` module to automatically detect the TeX engine and output format (PDF vs. DVI), providing a smarter fallback mechanism without legacy conditional branches. ---------------------------------------------------------------------- The package’s Catalogue entry can be viewed at https://ctan.org/pkg/graphicxpsd The package’s files themselves can be inspected at https://mirrors.ctan.org/macros/latex/contrib/graphicxpsd/ ---------------------------------------------------------------------- Thanks for the upload. For the CTAN Team Vincent Goulet ---------------------------------------------------------------------- CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs

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CTAN update: pyjupyter
by CTAN Announcements via ctan-ann 12 Mar '26

12 Mar '26

Bara Ouyèté Bright submitted an update to the pyjupyter package. Version number: 1.1.0 2026-03-11 License type: lppl1.3c Summary description: Lightweight environment for typesetting Python code Announcement text: ---------------------------------------------------------------------- We are pleased to announce pyjupyter v1.1.0, the second release of the LaTeX package for displaying Python code in Jupyter-style boxes. This release introduces significant enhancements and customization options based on user feedback. Users can now select from multiple monospaced fonts, including sourcecodepro, beramono, inconsolata, lmtt, courier, and txtt, allowing greater typographic flexibility. The package also supports adjustment of the code font size using standard LaTeX sizes such as tiny, scriptsize, footnotesize, small, normalsize, and large. Syntax highlighting has been improved to handle Python operators, keywords, and comments more accurately for better readability. Additionally, all tcolorbox options are now fully supported, including background and frame colors, corner rounding, spacing, and other layout customizations. Line numbering can be easily enabled using the built-in numbered option. This version maintains the package’s focus on providing a clean, minimal, and robust environment for embedding Python code in LaTeX documents, making it ideal for scientific reports, teaching materials, and reproducible research. ---------------------------------------------------------------------- This package is located at https://mirrors.ctan.org/macros/latex/contrib/pyjupyter More information is at https://www.ctan.org/pkg/pyjupyter ------------------------------------------------------------------------ Thanks for the upload. For the CTAN Team Erik Braun ------------------------------------------------------------------------ CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs

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CTAN update: tkz-elements
by CTAN Announcements via ctan-ann 12 Mar '26

12 Mar '26

Alain Matthes submitted an update to the tkz-elements package. Version number: 5.04c 2026-03-11 License type: lppl1.3c Summary description: A Lua library for drawing Euclidean geometry with TikZ or tkz-euclide Announcement text: ---------------------------------------------------------------------- ## [2026/03/11 — version 5.04c] ### Added - **triangle** - Added new attributes: `ma`, `mb`, `mc`, `ha`, `hb`, `hc`, `ia`, `ib`, `ic` - `ma`, `mb`, `mc`: midpoints of the sides - `ha`, `hb`, `hc`: feet of the altitudes - `ia`, `ib`, `ic`: feet of the internal angle bisectors - Added method: `triangle:reflections(pt)` ### Changed - **triangle** - Renamed method: `projection(pt)` -> `projections(pt)` ### Notes - **triangle** - `projections(pt)` and `reflections(pt)` apply to an arbitrary point. - `projection()` and `reflection()` apply to the triangle vertices. ---------------------------------------------------------------------- This package is located at https://mirrors.ctan.org/macros/latex/contrib/tkz/tkz-elements More information is at https://www.ctan.org/pkg/tkz-elements ------------------------------------------------------------------------ Thanks for the upload. For the CTAN Team Erik Braun ------------------------------------------------------------------------ CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs

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New on CTAN: spotxcolor
by CTAN Announcements via ctan-ann 12 Mar '26

12 Mar '26

Munehiro Yamamoto submitted the spotxcolor package. Version number: 0.14 2026-03-12 License type: mit Summary description: Modern Spot Color support for the xcolor package Announcement text: ---------------------------------------------------------------------- This package provides robust and modern spot color (e.g., DIC, PANTONE) support for the `xcolor` package across all major TeX engines (pdfTeX, LuaTeX, XeTeX, and dvipdfmx). It resolves the structural PDF syntax issues found in the legacy `spotcolor` package and provides a more robust, expl3-based architecture compared to the `colorspace` package. Key features included in this initial release: - Native `xcolor` integration: `\textcolor` generates true spot color separation plates in pdfTeX and LuaTeX without breaking the color stack. - Safe fallback for dvipdfmx: `\textcolor` safely falls back to a CMYK representation, avoiding parse errors and black-box outputs. - Explicit spot color injection: Added the `\SpotColor` macro to force true spot color output in dvipdfmx and other engines. - Perfect PDF structure: Safely expands variables and manages PDF objects to prevent garbage collection issues and broken cross-references. - Backward compatibility: Seamlessly emulates legacy `spotcolor` macros (e.g., `\AddSpotColor`, `\NewSpotColorSpace`) to reuse existing color dictionaries without modification. ---------------------------------------------------------------------- This package is located at https://mirrors.ctan.org/macros/latex/contrib/spotxcolor More information is at https://www.ctan.org/pkg/spotxcolor ------------------------------------------------------------------------ Thanks for the upload. For the CTAN Team Erik Braun ------------------------------------------------------------------------ CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs

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CTAN update: nicematrix
by CTAN Announcements via ctan-ann 12 Mar '26

12 Mar '26

François Pantigny submitted an update to the nicematrix package. Version number: 7.8 2026-03-11 License type: lppl1.3 Summary description: Improve the typesetting of matrices and tabulars with PGF Announcement text: ---------------------------------------------------------------------- New key draw-trees-in-col (and keys trees/color, trees/line-width and trees/rounded-corners). ---------------------------------------------------------------------- This package is located at https://mirrors.ctan.org/macros/latex/contrib/nicematrix More information is at https://www.ctan.org/pkg/nicematrix ------------------------------------------------------------------------ Thanks for the upload. For the CTAN Team Erik Braun ------------------------------------------------------------------------ CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs

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CTAN update: expltools
by CTAN Announcements 11 Mar '26

11 Mar '26

Vít Starý Novotný submitted an update to the expltools package. Version: 2026-03-10 License: lppl1.3c gpl2+ Summary description: Development tools for expl3 programmers Announcement text: ---------------------------------------------------------------------- ## expltools 2026-03-10 ### explcheck v0.18.1 #### Fixes This version of explcheck has fixed the following problems: - Merge consecutive blocks of function (variant) definitions and function undefinitions into macro-statements that form flow-graph vertices instead of individual statements. (suggested by @lostenderman in #156, fixed in #183) This change improves processing time by about 10% for an average package file in TeX Live 2024, and by up to 98% (or 53×) for large files such as `expl3-code.tex` when flow analysis is enabled despite incomplete code understanding. It also reduces the memory footprint of flow analysis by up to 3× for those files. After this change, the default value of the Lua option `max_reaching_definition_inner_loops` has been reduced from 30,000,000 to just 650,000 inner-loop iterations. - Fix the assignment of segment numbers to replacement texts. (#183) This would cause function definition statements to point to segments other than the replacement texts, confusing the flow analysis. This change reduces processing time by about 2% for an average package file in TeX Live 2024, and by up to 11% for large files such as `expl3-code.tex` when flow analysis is enabled despite incomplete code understanding. - Raise an error on ambiguous uses of `--long-option VALUE`, where `VALUE` is a valid command-line option. (contributed by @muzimuzhi in #185 and c48fa116) #### Docker image This version of explcheck has made the following changes to our Docker image `ghcr.io/witiko/expltools/explcheck`: - Replace Lua 5.3 with LuaJIT in `Dockerfile`. (#184) This change improves processing time by about 33% for an average package file in TeX Live 2024, and by up to 61% for large files such as `expl3-code.tex` when flow analysis is enabled despite incomplete code understanding. #### Continuous integration This version of explcheck has made the following changes to our continuous integration: - Run regression tests on different Lua interpreters: Lua 5.2, 5.3, 5.4, LuaTeX, and LuaJIT. (#184) - Bump `docker/login-action` from 3 to 4. (contributed by @dependabot in #186.) Overall, the changes in this release reduce the processing time for large files such as `expl3-code.tex` from months to hours (up to 65×) when flow analysis is enabled despite incomplete code understanding, and reduce the memory footprint of flow analysis by up to 3× for those files. While this is still insufficient for real-time use (e.g., in a language server; see ticket #68), it makes the tool practical for scenarios such as continuous integration. For a discussion of other potential performance improvements of the flow analysis, see ticket #156. ---------------------------------------------------------------------- The package’s Catalogue entry can be viewed at https://ctan.org/pkg/expltools The package’s files themselves can be inspected at https://mirrors.ctan.org/support/expltools/ ---------------------------------------------------------------------- Thanks for the upload. For the CTAN Team Vincent Goulet ---------------------------------------------------------------------- CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs

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CTAN update: latexmk
by CTAN Announcements 11 Mar '26

11 Mar '26

John Collins submitted an update to the > > latexmk > > package. > > Version: 4.88 2026-03-09 > License: gpl2 > > Summary description: Fully automated LaTeX document generation > > Announcement text: > ---------------------------------------------------------------------- > > 1. Some corrections to documentation, notably for $dvipdf and $dvips_pdf_switch. > 2. Improve some messages. > 3. Miscellaneous bug corrections. > 4. Use clock time for timing reports on cygwin and msys, and not just Windows. > 5. On Linux, default command for starting previewers is xdg-open. > 6. Add lualatex-related item to @file_not_found patterns. > 7. Add -cc (continuous compile) option, equiv. to -pvc -view=none. > 8. For msys, make better setting for @rc_system_files. > 9. Avoid unnecessary extra run(s) of lualatex after font cache is updated. > 10. On Windows, change default for $dvipdf so that -dvipdf works on Windows. > 11. Prevent loss of memory of state of custom dependencies that occured > after a run of *latex that ended early because of an error: When custom > dependencies were applied to files generated during a run of *latex, > the memory loss would result in much excessive invocation of custom > dependencies. > 12. Update nomenclature_latexmkrc. > 13. Prevent loss of memory of state of cus_deps and their uses after a run of > *latex that gives an error. Previously, after a run is aborted early > because of a syntax error (etc) and a second run is done after file(s) > are corrected, sometimes the loss of memory would cause unnecessary (and > sometimes very time consuming) extra runs of cus_deps. > 14. Correct statement of -bibtex* default in on-line help. > > ---------------------------------------------------------------------- > > The package’s Catalogue entry can be viewed at > https://ctan.org/pkg/latexmk > > The package’s files themselves can be inspected at > https://mirrors.ctan.org/support/latexmk/ > > ---------------------------------------------------------------------- > > Thanks for the upload. > > For the CTAN Team > Vincent Goulet > > ---------------------------------------------------------------------- > > CTAN is run entirely by volunteers and supported by TeX user groups. > Please join a user group or donate to one, see https://ctan.org/lugs

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