Callouts at page bottom are split across two pages.

Start by reproducing the issue with the attached index.md and callout_contents.md files using the documented quarto preview command. Compare the generated PDF and DOCX outputs, then trace the callout pagination behavior and identify where an automatic page break could be applied. Done means short callouts no longer split across pages in both formats, with the reported behavior verified.

I have:

• searched the issue tracker for similar issues
• installed the latest version of Quarto CLI
• formatted my issue following the Bug Reports guide

Bug description

Callouts placed at the bottom of the page that are shorter than the page height are split across two pages, which looks unprofessional.

Steps to reproduce

1. Create a new project via quarto create project manuscript quarto-individual-callout-placement
2. Copy the attached ìndex.md and callout_contents.md into the project directory. Replce the existing ìndex.qmdwithindex.md` via rename.
3. Preview the project via quarto preview quarto-individual-callout-placement/ --render all --debug
4. Check the placement of the callouts in the resulting PDF and MS Word (DOCX) outputs.

callout_contents.md

index.md

Actual behavior

If a callout begins just before the end of the page, it will be split across the current page and the next page.

This is true for PDF and DOCX. Other formats have not been checked.

Expected behavior

It would be much more advantageous to place an automatic {{< pagebreak >}} before such callouts if there is not enough space before the end of the page. It should be possible to disable this behavior via the callout’s configuration (in case of potential issues).

Your environment

• OS: Linux
• IDE: None

Quarto check output

Quarto 1.9.37
[✓] Checking environment information...
Quarto cache location: /home/mint/.cache/quarto
[✓] Checking versions of quarto binary dependencies...
Pandoc version 3.8.3: OK
Dart Sass version 1.87.0: OK
Deno version 2.4.5: OK
Typst version 0.14.2: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
Version: 1.9.37
Path: /opt/quarto/bin

[✓] Checking tools....................OK
TinyTeX: v2026.04
Chromium: (not installed)
Chrome Headless Shell: (not installed)
VeraPDF: (not installed)

[✓] Checking LaTeX....................OK
Using: TinyTex
Path: /home/mint/.TinyTeX/bin/x86_64-linux
Version: 2026

[✓] Checking Chrome Headless....................OK
Using: Chrome found on system
Path: /usr/bin/google-chrome
Source: PATH

[✓] Checking basic markdown render....OK

[✓] Checking R installation...........(None)

  Unable to locate an installed version of R.
  Install R from https://cloud.r-project.org/

[✓] Checking Python 3 installation....OK
Version: 3.12.3
Path: /home/mint/Desktop/quarto-env/bin/python3
Jupyter: 5.9.1
Kernels: python3

[✓] Checking Jupyter engine render....OK

[✓] Checking Julia installation...