diff --git a/AvocadoAmber/lib/thumbnail.lib.php b/AvocadoAmber/lib/thumbnail.lib.php
index d2d0d9e..ba3990a 100644
--- a/AvocadoAmber/lib/thumbnail.lib.php
+++ b/AvocadoAmber/lib/thumbnail.lib.php
@@ -5,7 +5,7 @@ if (!defined('_GNUBOARD_'))
 @ini_set('memory_limit', '-1');
 
 // 게시글리스트 썸네일 생성
-function get_list_thumbnail($bo_table, $wr_id, $thumb_width, $thumb_height, $is_create = false, $is_crop = false, $crop_mode = 'center', $is_sharpen = false, $um_value = '80/0.5/3')
+function get_list_thumbnail($bo_table, $wr_id, $thumb_width, $thumb_height, $is_create = false, $is_crop = false, $crop_mode = 'center', $is_sharpen = false, $um_value = '80/0.5/3', $distance = '0')
 {
   global $g5, $config;
   $filename = $alt = $data_path = '';
@@ -66,7 +66,7 @@ function get_list_thumbnail($bo_table, $wr_id, $thumb_width, $thumb_height, $is_
     return $thumbnail_info;
   }
 
-  $tname = thumbnail($filename, $filepath, $filepath, $thumb_width, $thumb_height, $is_create, $is_crop, $crop_mode, $is_sharpen, $um_value);
+  $tname = thumbnail($filename, $filepath, $filepath, $thumb_width, $thumb_height, $is_create, $is_crop, $crop_mode, $is_sharpen, $um_value, $distance);
 
   if ($tname) {
     if ($edt) {
@@ -229,7 +229,7 @@ function get_view_thumbnail($contents, $thumb_width = 0)
   return run_replace('get_view_thumbnail', $contents);
 }
 
-function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_height, $is_create, $is_crop = false, $crop_mode = 'center', $is_sharpen = false, $um_value = '80/0.5/3')
+function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_height, $is_create, $is_crop = false, $crop_mode = 'center', $is_sharpen = false, $um_value = '80/0.5/3', $distance = '0')
 {
   global $g5;
 
@@ -384,6 +384,14 @@ function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_h
             $src_x = round(($size[0] - $src_w) / 2);
           }
           break;
+        case 'custom':
+          if ($size[1] / $size[0] >= $ratio) {
+            $src_h = round($src_w * $ratio);
+            $src_y = $distance;
+          } else {
+            $src_w = round($size[1] / $ratio);
+          }
+          break;
         default:
           if ($size[1] / $size[0] >= $ratio) {
             $src_h = round($src_w * $ratio);