You can use markdown to write and format text in GitHub - in Issues, Pull Requests, and markdown files. Here is a list of the most important features.

Headings

`#` Heading

`##` Heading2

`###` Heading3

Formatting text

Formatting **bold text**, _italic text_ and ***bold and italic***. You can also use ~~~~strikethrough text~~~~.

> This is a quote

>> This is a nested quote

Links

https://xpirit.com/ Link Text Test.pdf

Images

You can drag or drop images to markdown and they will get uploaded automatically.

octocat

Size images

Use img to set the with of the image:

Display images depending on theme:

Light Dark

You can now also use picture tag:

Videos

https://user-images.githubusercontent.com/5276337/154125940-0172902e-da3f-4e6e-a4a4-cab7c6a86cde.mp4

Lists

List item 1
List item 2

Item 1
Item 2

Nested lists

Root
- First nested item
  - Second nested item

Footnotes

You can user a footnote¹ in markdown that allows you to jump to it and back using links.

A footnote can have multiple lines².

You can also use words, to fit your writing style more closely³.

Comments and escaping

Use \ to escape markdown: This text is *not bold* and _not italic_.

emojis and keyboard keys

:+1: :shipit: :medal_sports: :-1: :100: :trophy: :house:

Ctrl Enter Space Ctrl+C

Tables

Left-aligned	Center-aligned	Right-aligned
title1	`git status`	1.75%
title2	`git diff`	2.81%
title3	`git add`	3.51%

Collapsable sections

This content is hidden by default and you have to click `Details` to see it.

Details with custom summary

This content is hidden by default and you have to click `Details with custom summary` to see it.

Syntax highlighted code blocks

C#:

void WriteHelloWorld(string name)
{
  Console.WriteLine("Hello World and {0}!", name);
}
WriteHelloWorld("John Doe");
// writes 'Hello World and Johnm Doe' to STDOUT

Ruby:

def print_helloWorld(name)
  puts "Hello World and #{name}!"
end
print_helloWorld('Jon Doe')
#=> prints 'Hello World and Jon Doe!' to STDOUT.

JavaScript:

function writeHelloWorld(name) {
  console.log(`Hello World and ${name}!`);
}
writeHelloWorld('Jon Doe');
// writes 'Hello World and Jon Doe!' to STDOUT.

Flow Chart

>graph RL;
    7e536==>96a85;
    b7e6b==>7e536;
    main-.->b7e6b;
    HEAD-->main;
    55805==>7e536;
    branch-.->55805;
    tag-.->55805;

Sequence diagram

>sequenceDiagram
    participant Me
    participant You
    Me->>You: Hello, how are you?
    loop Self reflection
        You->>You: How am I?
    end
    Note right of You: Say the truth? 🤔 
    You-->>Me: Great!

Gant Diagram

>gantt
dateFormat  YYYY-MM-DD
title Preparing conference talk
excludes weekdays 2022-02-16

section Prep
Prepare Slides :done,    des1, 2022-02-01,2022-02-15
Prepare Demo :active,  des2, 2022-02-17, 3d

section Conference
Talk 1 : des3, after des2, 5d
Talk 2 : des4, after des3, 5d

Class diagram

>classDiagram
Truck <|-- Vehicle : specialized
Bike *-- Vehicle
Truck : size()
Vehicle : int Wheels

Mentions

Mention using GitHub handle: @kaufm (only works in Issues and Pull Requests)

Reference labels

Reference labels in markdown: https://github.com/wulfland/AccelerateDevOps/labels/documentation

Geo location

>{
  "type": "Feature",
  "geometry": {
    "type": "Point",
    "coordinates": [-4.842228, 36.502749]
  },
  "properties": {
    "name": "Kitesurf Zone",
    "Conditions": "Poniente, Levante",
    "Ratings": "⭐ ⭐ ⭐ ⭐ ⭐ "
  }
}

topoJSON

>{
    "type": "Topology",
    "objects": {
        "data": {
            "geometries": [
                {
                    "id": "0",
                    "type": "Polygon",
                    "properties": {"name": "abc"},
                    "bbox": [0.0, 0.0, 1.0, 1.0],
                    "arcs": [[-2, 0]]
                },
                {
                    "id": "1",
                    "type": "Polygon",
                    "properties": {"name": "def"},
                    "bbox": [1.0, 0.0, 2.0, 1.0],
                    "arcs": [[1, 2]]
                }
            ],
            "type": "GeometryCollection"
        }
    },
    "bbox": [0.0, 0.0, 2.0, 1.0],
    "arcs": [
        [[1.0, 0.0], [0.0, 0.0], [0.0, 1.0], [1.0, 1.0]], [[1.0, 0.0], [1.0, 1.0]],
        [[1.0, 1.0], [2.0, 1.0], [2.0, 0.0], [1.0, 0.0]]
    ]
}

STL 3D rendering

>solid b'STLB ATF 10.13.0.1454 COLOR=&\x83\xe7\xff'
facet normal -0.000000 0.000000 34.810009
  outer loop
    vertex 50.000000 5.900000 5.900000
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  endloop
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facet normal 0.000000 0.000000 34.810009
  outer loop
    vertex 55.900002 5.900000 5.900000
    vertex 50.000000 0.000000 5.900000
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  endloop
endfacet
facet normal -0.000000 -0.000000 -34.810009
  outer loop
    vertex 55.900002 5.900000 0.000000
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facet normal 0.000000 0.000000 -34.810009
  outer loop
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endfacet
facet normal 34.810001 -0.000000 0.000000
  outer loop
    vertex 55.900002 0.000000 5.900000
    vertex 55.900002 0.000000 0.000000
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  endloop
endfacet
facet normal 34.810001 0.000000 0.000000
  outer loop
    vertex 55.900002 5.900000 5.900000
    vertex 55.900002 0.000000 0.000000
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    vertex 50.000000 0.000000 0.000000
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endfacet
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  outer loop
    vertex 50.000000 5.900000 5.900000
    vertex 50.000000 5.900000 0.000000
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  endloop
endfacet
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  outer loop
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  outer loop
    vertex 50.000000 5.900000 5.900000
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endfacet
endsolid b'STLB ATF 10.13.0.1454 COLOR=&\x83\xe7\xff'

Past tables and spreadsheets to markdown:

<style>

Animal	Color	Amount
Tiger	Yellow	25
Horse	Brown	7

Disable using cmd|ctrl+shift+v:

Animal Color Amount Tiger Yellow 25 Horse Brown 7

Render mathematical expressions in Markdown using LaTeX syntax:

The Cauchy-Schwarz Inequality $$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$

Render it inline: This sentence uses $ delimiters to show math inline: $\sqrt{3x-1}+(1+x)^2$

My reference. ↩
Every new line should be prefixed with 2 spaces.
This allows you to have a footnote with multiple lines. ↩
Named footnotes will still render with numbers instead of the text but allow easier identification and linking.
This footnote also has been made with a different syntax using 4 spaces for new lines. ↩