As documented on the website (<https://quarto.org/docs/authoring/figures.html#figure-alignment>): > Figures and their captions are center aligned by default. But this is currently not true: - When a figure has a caption, the figure is center aligned, but not the caption. - When a figure has no caption, the figure is left aligned. This is consistent for both `html` and `revealjs` formats. Example: <https://github.com/mcanouil/quarto-issues/tree/main/quarto-cli%23949> Version: `0.9.433`