# \[ANN\] PrettyTables v3.0.0

**URL:** <https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821>\
**Category:** Package Announcements\
**Tags:** prettytables\
**Created:** [August 25, 2025, 1:53am UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821 "2025-08-25T01:53:49Z")\
**Posts on this page:** 7\
**Page:** 5

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**Author:** ![Ronis\_BR](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ronis_br/32/50999_2.png) [@Ronis\_BR](https://discourse.julialang.org/u/Ronis_BR)\
**Post date:** [September 26, 2025, 5:52pm UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821/81 "2025-09-26T17:52:53Z")

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Btw, what you are using in those screenshots? I will try to install here to debug.

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**Author:** ![juliohm](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/juliohm/32/215266_2.png) [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Post date:** [September 26, 2025, 6:02pm UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821/82 "2025-09-26T18:02:46Z")

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> [@Ronis\_BR](#):
>
> We need to verify why the system is not rendering the HTML output and showing plain text instead.

Could that be related to the `renderer=:show` option? You suggested this option in our own `GeoTable` type for correct HTML output. Is DataFrames.jl already using it?

> [@Ronis\_BR](#):
>
> Btw, what you are using in those screenshots?

I am just extracting the images from the Quarto-rendered book.

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**Author:** ![Ronis\_BR](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ronis_br/32/50999_2.png) [@Ronis\_BR](https://discourse.julialang.org/u/Ronis_BR)\
**Post date:** [September 26, 2025, 6:40pm UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821/83 "2025-09-26T18:40:07Z")

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> [@juliohm](#):
>
> Could that be related to the `renderer=:show` option? You suggested this option in our own `GeoTable` type for correct HTML output. Is [DataFrames.jl](https://juliaregistries.github.io/General/packages/redirect_to_repo/DataFrames) already using it?

No, I don’t think so. This option changes how the cells are converted to strings only.

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**Author:** ![Ronis\_BR](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ronis_br/32/50999_2.png) [@Ronis\_BR](https://discourse.julialang.org/u/Ronis_BR)\
**Post date:** [September 27, 2025, 1:13pm UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821/84 "2025-09-27T13:13:46Z")

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Hi @juliohm !

I finally could install Quarto and I know what is happening. First, Quarto stretches the table to fill the display. When we selected the default values for DataFrames.jl, we used Jupyter as the default, which does not do this.

Hence, there is two options:

1. Keep your workaround that makes the cells use the same alignment as the column labels.
2. Customize the Quarto output CSS to avoid this stretch.

If you want to keep the workaround, I found a very weird behavior in Quarto that we could not check for `stdout` if we were wrapping the `io` in an `IOContext`. I fixed this and everything should work when PrettyTables.jl v3.0.11 is released.

For the workaround, do this:

```julia
show(stdout, MIME("text/html"), df; column_label_alignment = :n)

```

The output will be:

 ![Captura de Tela 2025-09-27 às 10.13.37](https://global.discourse-cdn.com/julialang/original/3X/c/9/c9ec715ae05f6d7cc2025fbc75411ff9f11b8677.png)

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**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [October 13, 2025, 7:57am UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821/85 "2025-10-13T07:57:06Z")

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I am not so sure this is the right place to ask, but I also struggle a bit with transitioning to 3.0; my old code (also in Quarto) was

```julia-auto
pretty_table(df_results_time_iter; backend = Val(:markdown), header = header_1)

```

(see full notebook at [ManoptExamples.jl/examples/CRPG-Sparse-Approximation.qmd at main · JuliaManifolds/ManoptExamples.jl · GitHub](https://github.com/JuliaManifolds/ManoptExamples.jl/blob/main/examples/CRPG-Sparse-Approximation.qmd), for this line 497 for example)

I struggle with

- what are the new ways to specify a backend and the headers?
- The current form _either_ prints markdown but in a code environment (meh!) or if I set `#| output: asis` – I hoped to get the Markdown just “as is” (the name is telling) but U just get `[TABLE]` then. Any idea what to do in this case?

If the second one is too advanced for this thread I can also do a new one, but the transition in Keyword arguments would be nice to know, since I could not find these in a changelog (maybe I missed that)?

Besides so many questions, thanks for providing such a nice package to do pretty tables!

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<div class="post-metadata">

**Author:** ![Ronis\_BR](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ronis_br/32/50999_2.png) [@Ronis\_BR](https://discourse.julialang.org/u/Ronis_BR)\
**Post date:** [October 14, 2025, 12:36am UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821/86 "2025-10-14T00:36:39Z")

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> [@kellertuer](#):
>
> - what are the new ways to specify a backend and the headers?
> - The current form _either_ prints markdown but in a code environment (meh!) or if I set `#| output: asis` – I hoped to get the Markdown just “as is” (the name is telling) but U just get `[TABLE]` then. Any iFdea what to do in this case?

For the first one you can do:

```julia
pretty_table(df_results_time_iter; backend = :markdown, column_labels = header_1)

```

For the second, I have no idea. Isn’t it something related to how Quarto works?

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<div class="post-metadata">

**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [October 14, 2025, 6:23am UTC](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821/87 "2025-10-14T06:23:20Z")

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Thanks! For the second I opened a new thread at [Strange Quarto output using PrettyTables](https://discourse.julialang.org/t/strange-quarto-output-using-prettytables/133104), since I am also very unsure where to fix that (i.e. quarto vs QuartoNotebookRunner.jl vs PrettyTables.jl).

[Previous page](https://discourse.julialang.org/t/ann-prettytables-v3-0-0/131821.md?page=4)