Inline HTML

Underline

<u> Text </u>

Text

Color

<span style="color: #FF69B4;">Why did the tomato turn red?</span> <span style="color: #00FFFF;">Because it saw the salad dressing!</span> <span style="color:red;">your text here in red</span>, <span style="color:#520099;">or make it blue</span>

Why did the tomato turn red? Because it saw the salad dressing! your text here in red, or make it blue

Commentary

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Collapsed section

<details> <summary>Tips for collapsed sections</summary> You can add text within a collapsed section. You can add an image or a code block, too. ```ruby puts "Hello World" ``` </details>
Tips for collapsed sections

You can add text within a collapsed section.

You can add an image or a code block, too.

puts "Hello World"

Align

&emsp; &emsp;Centrera

   Centrera


&ensp; &ensp; &ensp;Centrera

     Centrera


&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Centrera

         Centrera


Center align

<p style="text-align: center;">Text i mitten

Text i mitten

Keyboard

<kbd>Ctrl</kbd> + <kbd>F</kbd>

Ctrl + F

Embed video

Local source

<video src="imgburn.mp4" width="100%" height="100%" controls></video>

Interweb source

<iframe width="100%" height="100%" src="https://www.youtube.com/embed/tgbNymZ7vqY"> </iframe>

note

height="100%" width="100%" doesn't work in mdBook, so I've changed to width="100%" height="420px" below.