Drupal Garden Site Structure Management
The Drupal Garden Structure page is where you manage many of the features, pages, and blocks present on your site. Some of the specific features, blocks, and pages you can control from this page include Contact forms, Forums, and Mailing lists. You can also manage the features that appear in blocks by using the Blocks page.
Suppose you've created a Drupal Gardens site with all the bells and whistles. But you've decided that you really don't like that rotating banner or you don't want to use the media gallery just yet. To manage the content that currently appears on your site, follow these steps:
Make sure you’re logged in, and then click the My Sites link.
This opens the Drupal Gardens Site manager.
Click the site you want to manage.
Find the block you want to remove, and choose None from the Region drop-down list to the right of it.
For example, the Rotating Banner block was removed by selecting None from the Region drop-down list.
Click Save Blocks.
The block you removed will no longer appear.