Template:Show/Table usage

{| class="wikitable" width=300px
|-
|
{{show
|Header!
|Content!
This information here will not show until you click the "show" button. It's then hidden by collapsing the section when you press "hide" button.}}
|}

...Yields this:

Header! Content! This information here will not show until you click the "show" button. It's then hidden by collapsing the section when you press "hide" button.