Some examples of text formatting for some common text elements.

Headers

Header1

Header2

Header3

Header4

Emphasis

Italics: asterisks -> asterisks or underscores -> underscores.

Bold: asterisks -> asterisks or underscores -> underscores.

You also can combine them: asterisks and underscores -> asterisks and underscores.

Blockquotes and notes

>Blockquotes

Blockquotes

Using very cool feature of kramdown which allows to assign any attribute to a block-level element I’ve added note and warning:

>Note 
{: .note}

Note

>Warning 
{: .note .warning}

Warning

Keyboard buttons

In case you need to show some keyboard shortcuts, like Ctrl+A use following construction:

</span>Ctrl<span class="sb">{: .key}+</span>A<span class="sb">{:.key}

Example of keyboard shortcuts in a terminal:

Ctrl + A = move cursor to beginning of line
Ctrl + E = move cursor to end of line
Ctrl + C = kills the current process.
Ctrl + Z = sends the current process to the background.
Ctrl + D = logs you out.
Ctrl + R = finds the last command matching the entered letters.