How to center an image without name (typst)?

[kasergus]

Description

Hello! I am using typst with quarto. When I create an image, such as

![](/path/to/image)

This inserts image not centered, but if I will add name

![any_name](/path/to/image)

It will be centered, but with label “Figure X: any_name”.

I want centered image without name. I know that one can add {fig-align: center}, but I don’t want to add it each time I create an image wihtout name. So is it possible to somehow set that in typst-template or quarto initial settings?

[mcanouil]

fig-align is mostly for figures (cross-referenceable images), not images, and works at document/project level.
For Typst, you need to set a show rule to target image(), unfortunately, it's wrapped with box() (use keep-typ: true, to see the Typst document), so the show rule approach alone won't work as of current Typst (i.e., you might need a Lua filter).

[mcanouil]

---
title: "Quarto Playground"
format:
  typst:
    keep-typ: true
    img-align: center
    filters:
      - path: center-images.lua
        at: post-quarto
---

{{< placeholder 60 40 >}}

::: {#fig-one}
{{< placeholder 60 40 >}}

Caption for figure one.
:::

{{< placeholder 60 40 >}}

--- center-images - Filter
--- @module center-images.lua
--- @license MIT
--- @copyright 2026 Mickaël Canouil
--- @author Mickaël Canouil
--- @version 0.1.0
--- @description Align standalone images in Typst output using the `img-align`
--- attribute or metadata field. Must run at `post-quarto`.

local meta = {}

--- Get alignment value from image attributes or document metadata.
local function get_align(img)
  local align = img.attributes["img-align"]
  if align ~= nil then
    return align
  end
  local meta_align = meta["img-align"]
  if meta_align ~= nil then
    return pandoc.utils.stringify(meta_align)
  end
  return "center"
end

--- Check if a Para block contains a single image (with optional soft breaks).
local function get_sole_image(para)
  local img = nil
  for _, inline in ipairs(para.content) do
    if inline.t == "Image" then
      if img ~= nil then
        return nil
      end
      img = inline
    elseif inline.t ~= "SoftBreak" and inline.t ~= "Space" then
      return nil
    end
  end
  return img
end

--- Wrap standalone images in Typst alignment blocks.
local function process_para(para)
  if not quarto.doc.is_format("typst") then
    return nil
  end
  local img = get_sole_image(para)
  if img == nil then
    return nil
  end
  local align = get_align(img)
  local raw_open = pandoc.RawInline("typst", "#align(" .. align .. ")[")
  local raw_close = pandoc.RawInline("typst", "]")
  return pandoc.Para({ raw_open, img, raw_close })
end

return {
  {
    Meta = function(m)
      meta = m
    end,
  },
  {
    Para = process_para,
  },
}