Wikipedia:Expand Hidden Templates

Expand Hidden Templates (source code) is a script that adds a link to the toolbox in the left-hand panel called "Expand templates". When clicked on, it expands all hidden templates, including hidden, hidden archive top, and their derivatives. After expanding the templates, the link in the toolbox can then be used to collapse all hidden templates again.

Installation
To enable this script, go to your skin.js, edit the page, and add the following line to it:

Settings
To make the script add its link to somewhere else besides the "toolbox", add one of the following to your skin.js:


 * Add a tab to the top of the page


 * Add a link to the navigation panel in the left-hand column