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----
-description: All concepts needed to style your document with Typst.
----
-
-# Styling
-Typst includes a flexible styling system that automatically applies styling of
-your choice to your document. With _set rules,_ you can configure basic
-properties of elements. This way, you create most common styles. However, there
-might not be a built-in property for everything you wish to do. For this reason,
-Typst further supports _show rules_ that can completely redefine the appearance
-of elements.
-
-## Set rules { #set-rules }
-With set rules, you can customize the appearance of elements. They are written
-as a [function call]($type/function) to an
-[element function]($type/function/#element-functions) preceded by the `{set}`
-keyword (or `[#set]` in markup). Only optional parameters of that function can
-be provided to the set rule. Refer to each function's documentation to see which
-parameters are optional. In the example below, we use two set rules to change
-the [font family]($func/text.font) and
-[heading numbering]($func/heading.numbering).
-
-```example
-#set heading(numbering: "I.")
-#set text(
-  font: "New Computer Modern"
-)
-
-= Introduction
-With set rules, you can style
-your document.
-```
-
-A top level set rule stays in effect until the end of the file. When nested
-inside of a block, it is only in effect until the end of that block. With a
-block, you can thus restrict the effect of a rule to a particular segment of
-your document. Below, we use a content block to scope the list styling to one
-particular list.
-
-```example
-This list is affected: #[
-  #set list(marker: [--])
-  - Dash
-]
-
-This one is not:
-- Bullet
-```
-
-Sometimes, you'll want to apply a set rule conditionally. For this, you can use
-a _set-if_ rule.
-
-```example
-#let task(body, critical: false) = {
-  set text(red) if critical
-  [- #body]
-}
-
-#task(critical: true)[Food today?]
-#task(critical: false)[Work deadline]
-```
-
-## Show rules { #show-rules }
-With show rules, you can deeply customize the look of a type of element. The
-most basic form of show rule is a _show-set rule._ Such a rule is written as the
-`{show}` keyword followed by a [selector]($type/selector), a colon and then a set rule. The most basic form of selector is an
-[element function]($type/function/#element-functions). This lets the set rule
-only apply to the selected element. In the example below, headings become dark
-blue while all other text stays black.
-
-```example
-#show heading: set text(navy)
-
-= This is navy-blue
-But this stays black.
-```
-
-With show-set rules you can mix and match properties from different functions to
-achieve many different effects. But they still limit you to what is predefined
-in Typst. For maximum flexibility, you can instead write a show rule that
-defines how to format an element from scratch. To write such a show rule,
-replace the set rule behind the colon with an arbitrary
-[function]($type/function). This function receives the element in question and
-can return arbitrary content. Different
-[fields]($scripting/#fields) are available on the element passed
-to the function. Below, we define a show rule that formats headings for a
-fantasy encyclopedia.
-
-```example
-#set heading(numbering: "(I)")
-#show heading: it => block[
-  #set align(center)
-  #set text(font: "Inria Serif")
-  \~ #emph(it.body)
-     #counter(heading).display() \~
-]
-
-= Dragon
-With a base health of 15, the
-dragon is the most powerful
-creature.
-
-= Manticore
-While less powerful than the
-dragon, the manticore gets
-extra style points.
-```
-
-Like set rules, show rules are in effect until the end of the current block or
-file.
-
-Instead of a function, the right-hand side of a show rule can also take a
-literal string or content block that should be directly substituted for the
-element. And apart from a function, the left-hand side of a show rule can also
-take a number of other _selectors_ that define what to apply the transformation
-to:
-
-- **Everything:** `{show: rest => ..}` \
-  Transform everything after the show rule. This is useful to apply a more
-  complex layout to your whole document without wrapping everything in a giant
-  function call.
-
-- **Text:** `{show "Text": ..}` \
-  Style, transform or replace text.
-
-- **Regex:** `{show regex("\w+"): ..}` \
-  Select and transform text with a regular expression for even more flexibility.
-  See the documentation of the [`regex` function]($func/regex) for details.
-
-- **Function with fields:** `{show heading.where(level: 1): ..}` \
-  Transform only elements that have the specified fields. For example, you might
-  want to only change the style of level-1 headings.
-
-- **Label:** `{show <intro>: ..}` \
-  Select and transform elements that have the specified label.
-  See the documentation of the [`label` function]($func/label) for more details.
-
-```example
-#show "Project": smallcaps
-#show "badly": "great"
-
-We started Project in 2019
-and are still working on it.
-Project is progressing badly.
-```