$output='<p>'.t('Blocks are boxes of content rendered into an area, or region, of a web page. The default theme Garland, for example, implements the regions "left sidebar", "right sidebar", "content", "header", and "footer", and a block may appear in any one of these areas. The <a href="@blocks">blocks administration page</a> provides a drag-and-drop interface for assigning a block to a region, and for controlling the order of blocks within regions.',array('@blocks'=>url('admin/structure/block'))).'</p>';
$output.='<p>'.t('Although blocks are usually generated automatically by modules (like the <em>User login</em> block, for example), administrators can also define custom blocks. Custom blocks have a title, description, and body. The body of the block can be as long as necessary, and can contain content supported by any available <a href="@text-format">text format</a>.',array('@text-format'=>url('admin/config/content/formats'))).'</p>';
$output.='<p>'.t('When working with blocks, remember that:').'</p>';
$output.='<ul><li>'.t('since not all themes implement the same regions, or display regions in the same way, blocks are positioned on a per-theme basis.').'</li>';
$output.='<li>'.t('disabled blocks, or blocks not in a region, are never shown.').'</li>';
$output.='<li>'.t('blocks can be configured to be visible only on certain pages.').'</li>';
$output.='<li>'.t('blocks can be configured to be visible only when specific conditions are true.').'</li>';
$output.='<li>'.t('blocks can be configured to be visible only for certain user roles.').'</li>';
$output.='<li>'.t('when allowed by an administrator, specific blocks may be enabled or disabled on a per-user basis using the <em>My account</em> page.').'</li>';
$output.='<li>'.t('some dynamic blocks, such as those generated by modules, will be displayed only on certain pages.').'</li></ul>';
$output.='<p>'.t('For more information, see the online handbook entry for <a href="@block">Block module</a>.',array('@block'=>'http://drupal.org/handbook/modules/block/')).'</p>';
$output='';
$output='<h3>'.t('About').'</h3>';
$output.='<p>'.t('Blocks are boxes of content rendered into an area, or region, of one or more pages of a website. The default theme Seven, for example, implements the regions "Content", "Help", "Dashboard main", and "Dashboard sidebar", and a block may appear in any one of these areas. The <a href="@blocks">blocks administration page</a> provides a drag-and-drop interface for assigning a block to a region, and for controlling the order of blocks within regions. For more information, see the online handbook entry for <a href="@block">Block module</a>.',array('@block'=>'http://drupal.org/handbook/modules/block/','@blocks'=>url('admin/structure/block'))).'</p>';
$output.='<h3>'.t('Uses').'</h3>';
$output.='<dl>';
$output.='<dt>'.t('Positioning content').'</dt>';
$output.='<dd>'.t('When working with blocks, remember that all themes do <em>not</em> implement the same regions, or display regions in the same way. Blocks are positioned on a per-theme basis. Users with the <em>Administer blocks</em> permission can disable blocks. Disabled blocks are listed on the <a href="@blocks">blocks administration page</a>, but are not displayed in any region.',array('@block'=>'http://drupal.org/handbook/modules/block/','@blocks'=>url('admin/structure/block'))).'</dd>';
$output.='<dd>'.t('Blocks can be configured to be visible only on certain pages, only to users of certain roles, or only on pages displaying certain <a href="@content-type">content types</a>. Administrators can also allow specific blocks to be enabled or disabled by users when they edit their <a href="@user">My account</a> page. Some dynamic blocks, such as those generated by modules, will be displayed only on certain pages.',array('@content-type'=>url('admin/structure/types'),'@user'=>url('user'))).'</dd>';
$output.='<dd>'.t('Users with the <em>Administer blocks</em> permission can <a href="@block-add">add custom blocks</a>, which are then listed on the <a href="@blocks">blocks administration page</a>. Once created, custom blocks behave just like default and module-generated blocks.',array('@blocks'=>url('admin/structure/block'),'@block-add'=>url('admin/structure/block/add'))).'</dd>';
$output.='</dl>';
return$output;
case'admin/structure/block/add':
return'<p>'.t('Use this page to create a new custom block. New blocks are disabled by default, and must be moved to a region on the <a href="@blocks">blocks administration page</a> to be visible.',array('@blocks'=>url('admin/structure/block'))).'</p>';
