How to add a shortcode that creates an adjacent column of text in the content editor?

Question

I'd like to enable a shortcode toolbar button, similar to the "More" break, that I can click to mark an insertion point where the text should be broken into columns.

Do shortcodes have encapsulation or would I need to enter an endpoint?

Example:

[column]The column starts here[/column]

Or

[columnBegin]The column starts here[columnEnd]

I'm looking for some examples or plugins that might make this possible.

Answer 1

Shortcode do have encapsulation. Read more about that here: http://codex.wordpress.org/Shortcode_API