Touying (投影 in Chinese, /tóuyǐng/, meaning projection) is a user-friendly, powerful, and efficient package for creating presentation slides in Typst.

If you like it, consider giving a star ⭐ on GitHub. Touying is a community-driven project — feel free to suggest ideas and contribute!

Why Touying?

• Beautiful themes — built-in themes like Simple, Metropolis, Dewdrop, University, Aqua, Stargazer and diverse themes on Typst Universe
• Fast — Typst compiles in milliseconds. Live previews update as you type, giving you the instant feedback.
• Rich animations — #pause, #meanwhile, math equation animations, CeTZ & Fletcher support
• Heading-based slides — write presentations like a document, no boilerplate
• Speaker notes — dual-screen support via tools like PowerPoint, HTML or pympress
• Export — Builtin PDF export, PPTX and HTML via touying-exporter
• Correct bookmarks — proper PDF outline and page numbers out of the box

Documents & Help

• Full documentation and references (English & Chinese)
• Ask DeepWiki or Ask Zread for AI-assisted help
• Gallery — slides made by the community
• Universe — Diverse touying themes on Typst Universe
• Share slides instantly on GitHub with gistd or export slides to PPTX and HTML formats and show presentation online.

Quick Start

Make sure you have Typst installed, or use the Web App / Tinymist for VS Code.

#import "@preview/touying:0.7.1": *
#import themes.simple: *

#show: simple-theme.with(aspect-ratio: "16-9")

= Title

== First Slide

Hello, Touying!

#pause

Hello, Typst!

Congratulations on creating your first Touying slide! 🎉

Animations

Touying supports incremental reveal with #pause and #meanwhile, math equation animations, and integrations with CeTZ and Fletcher:

Math equations	CeTZ & Fletcher

For the full feature set — cover mode, callback-style animations, #uncover, #only, #alternatives — see the documentation.

Full Example

For a comprehensive example showcasing university theme, theorems, CeTZ/Fletcher animations, speaker notes, and more. You can also use the #slide[..] format to access more powerful features provided by Touying.

#import "@preview/touying:0.7.1": *
#import themes.university: *
#import "@preview/cetz:0.4.2"
#import "@preview/fletcher:0.5.8" as fletcher: node, edge
#import "@preview/numbly:0.1.0": numbly
#import "@preview/theorion:0.5.0": *
#import cosmos.clouds: *
#show: show-theorion

// cetz and fletcher bindings for touying
#let cetz-canvas = touying-reducer.with(reduce: cetz.canvas, cover: cetz.draw.hide.with(bounds: true))
#let fletcher-diagram = touying-reducer.with(reduce: fletcher.diagram, cover: fletcher.hide)

#show: university-theme.with(
  aspect-ratio: "16-9",
  // align: horizon,
  // config-common(handout: true),
  config-common(frozen-counters: (theorem-counter,)),  // freeze theorem counter for animation
  config-info(
    title: [Title],
    subtitle: [Subtitle],
    author: [Authors],
    date: datetime.today(),
    institution: [Institution],
    logo: emoji.school,
  ),
)

#set heading(numbering: numbly("{1}.", default: "1.1"))

#title-slide()

== Outline <touying:hidden>

#components.adaptive-columns(outline(title: none, indent: 1em))

= Animation

== Simple Animation

We can use `#pause` to #pause display something later.

#pause

Just like this.

#meanwhile

Meanwhile, #pause we can also use `#meanwhile` to #pause display other content synchronously.

#speaker-note[
  + This is a speaker note.
  + You won't see it unless you use `config-common(show-notes-on-second-screen: right)`
]


== Complex Animation

At subslide #touying-fn-wrapper((self: none) => str(self.subslide)), we can

use #uncover("2-")[`#uncover` function] for reserving space,

use #only("2-")[`#only` function] for not reserving space,

#alternatives[call `#only` multiple times \u{2717}][use `#alternatives` function #sym.checkmark] for choosing one of the alternatives.


== Callback Style Animation

#slide(
  repeat: 3,
  self => [
    #let (uncover, only, alternatives) = utils.methods(self)

    At subslide #self.subslide, we can

    use #uncover("2-")[`#uncover` function] for reserving space,

    use #only("2-")[`#only` function] for not reserving space,

    #alternatives[call `#only` multiple times \u{2717}][use `#alternatives` function #sym.checkmark] for choosing one of the alternatives.
  ],
)


== Math Equation Animation

Equation with `pause`:

$
  f(x) &= pause x^2 + 2x + 1 \
  &= pause (x + 1)^2 \
$

#meanwhile

Here, #pause we have the expression of $f(x)$.

#pause

By factorizing, we can obtain this result.


== CeTZ Animation

CeTZ Animation in Touying:

#cetz-canvas({
  import cetz.draw: *

  rect((0, 0), (5, 5))

  (pause,)

  rect((0, 0), (1, 1))
  rect((1, 1), (2, 2))
  rect((2, 2), (3, 3))

  (pause,)

  line((0, 0), (2.5, 2.5), name: "line")
})


== Fletcher Animation

Fletcher Animation in Touying:

#fletcher-diagram(
  node-stroke: .1em,
  node-fill: gradient.radial(blue.lighten(80%), blue, center: (30%, 20%), radius: 80%),
  spacing: 4em,
  edge((-1, 0), "r", "-|>", `open(path)`, label-pos: 0, label-side: center),
  node((0, 0), `reading`, radius: 2em),
  edge((0, 0), (0, 0), `read()`, "--|>", bend: 130deg),
  pause,
  edge(`read()`, "-|>"),
  node((1, 0), `eof`, radius: 2em),
  pause,
  edge(`close()`, "-|>"),
  node((2, 0), `closed`, radius: 2em, extrude: (-2.5, 0)),
  edge((0, 0), (2, 0), `close()`, "-|>", bend: -40deg),
)


= Theorems

== Prime numbers

#definition[
  A natural number is called a #highlight[_prime number_] if it is greater
  than 1 and cannot be written as the product of two smaller natural numbers.
]
#example[
  The numbers $2$, $3$, and $17$ are prime.
  @cor_largest_prime shows that this list is not exhaustive!
]

#theorem(title: "Euclid")[
  There are infinitely many primes.
]
#pagebreak(weak: true)
#proof[
  Suppose to the contrary that $p_1, p_2, dots, p_n$ is a finite enumeration
  of all primes. Set $P = p_1 p_2 dots p_n$. Since $P + 1$ is not in our list,
  it cannot be prime. Thus, some prime factor $p_j$ divides $P + 1$. Since
  $p_j$ also divides $P$, it must divide the difference $(P + 1) - P = 1$, a
  contradiction.
]

#corollary[
  There is no largest prime number.
] <cor_largest_prime>
#corollary[
  There are infinitely many composite numbers.
]

#theorem[
  There are arbitrarily long stretches of composite numbers.
]

#proof[
  For any $n > 2$, consider $
    n! + 2, quad n! + 3, quad ..., quad n! + n
  $
]


= Others

== Multiple columns

#cols[
  First column.
][
  Second column.
]

== Multiple columns with equal height blocks

#cols(columns: (1fr, 1fr), gutter: 1em)[
  #emph-block[
    First column with equal height: #lorem(10)
    #lazy-v(1fr)
  ]
][
  #emph-block[
    Second column with equal height: : #lorem(15)
    #lazy-v(1fr)
  ]
]


== Multiple Pages

#lorem(200)


#show: appendix

= Appendix

== Appendix

Please pay attention to the current slide number.

Acknowledgements

Thanks to...

• @andreasKroepelin for the polylux package
• @zral0kh for the waypoint feature and many improvements
• @enklht for many fixes and improvements
• @Enivex for the metropolis theme
• @drupol for the university theme
• @pride7 for the aqua theme
• @Coekjan and @QuadnucYard for the stargazer theme
• @ntjess for contributing to fit-to-height, fit-to-width and cover-with-rect

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