Add this piece of code to your theme’s function.php file.
add_filter('widget_tag_cloud_args','set_number_tags'); function set_number_tags($args) { $args = array('number' => 20); return $args; }
Set the number of the amount of tags you want to display on your page.
Or you can just use the parameters for the wp_tag_cloud function.
<?php $args = array( 'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45, 'format' => 'flat', 'separator' => \"n\", 'orderby' => 'name', 'order' => 'ASC', 'exclude' => null, 'include' => null, 'topic_count_text_callback' => default_topic_count_text, 'link' => 'view', 'taxonomy' => 'post_tag', 'echo' => true, 'child_of' => null(see Note!) ); ?>
<?php wp_tag_cloud( $args ); ?>