Altering Forms from the Theme Layer for Drupal 7

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We're keeping this page up as a courtesy to folks who may need to refer to old instructions. We don't plan to update this page.

Sprout Video

This chapter gives an introduction to how you work with Drupal's renderable, form arrays by adding an image button to the search form. It also walks through the process of adding the necessary classes to a form element so that the image button is properly aligned. The Forms API reference document is a pretty essential reference document for creating and editing forms in Drupal.

Although we use the function dsm() in this video, this should probably be dpm() as that's the preferred function name. The functions dsm() and dpm() are identical.

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