In THEME/functions.php

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if (function_exists('add_image_size')) {
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  add_image_size('category-thumb', 280, 9999); //280px wide unlimited height
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  add_image_size('item_detail', 400, 500, true); // cropped
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}

To use new image sizes

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<?php
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if (has_post_thumbnail()) {
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  the_post_thumbnail('category-thumb');
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} //uses image size defined as 'category-thumb'

To show a list of links from the admin links section in a template:

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<?php wp_list_bookmarks( $args ); ?> 

Where $args can include the following:

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<?php $args = array(
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    'orderby'          => 'name',
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    'order'            => 'ASC',
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    'limit'            => -1,
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    'category'         => ,
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    'exclude_category' => ,
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    'category_name'    => ,
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    'hide_invisible'   => 1,
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    'show_updated'     => 0,
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    'echo'             => 1,
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    'categorize'       => 1,
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    'title_li'         => __('Bookmarks'),
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    'title_before'     => '<h2>',
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    'title_after'      => '</h2>',
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    'category_orderby' => 'name',
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    'category_order'   => 'ASC',
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    'class'            => 'linkcat',
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    'category_before'  => '<li id=%id class=%class>',
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    'show_description' => '1', 
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    'category_after'   => '</li>' ); ?> 
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