Title

• A Heading
• Collapsing Cells
• Tweetcards
• Youtube Videos
• Boxes / Callouts
• Footnotes

A Heading

Start with second level headings, as above.

Links look like this.

And images like this:

or like this: ![](my_icons/fastai_logo.png)

Highlighted text looks like this.

Collapsing Cells

#collapse-hide
# This cell is collapsable and collapsed by default

#collapse-show
# This cell is collapsable and shown by default

Tweetcards

Typing > twitter: https://twitter.com/jakevdp/status/1204765621767901185?s=20 will render this:

Altair 4.0 is released! https://t.co/PCyrIOTcvv
Try it with:

pip install -U altair

The full list of changes is at https://t.co/roXmzcsT58 ...read on for some highlights. pic.twitter.com/vWJ0ZveKbZ

— Jake VanderPlas (@jakevdp) December 11, 2019

Youtube Videos

Typing > youtube: https://youtu.be/XfoYk_Z5AkI will render this:

Boxes / Callouts

Typing > Warning: There will be no second warning! will render this:

Warning: There will be no second warning!

Typing > Important: Pay attention! It's important. will render this:

Important: Pay attention! It’s important.

Typing > Tip: This is my tip. will render this:

Tip: This is my tip.

Typing > Note: Take note of this. will render this:

Note: Take note of this.

Typing > Note: A doc link to [an example website: fast.ai](https://www.fast.ai/) should also work fine. will render in the docs:

Note: A doc link to an example website: fast.ai should also work fine.

Footnotes

For example, here is a footnote ¹.

And another ²

1. This is the footnote.↩

2. This is the other footnote. You can even have a link!↩