diff --git a/Themes.md b/Themes.md
index 605ac47..9ccaafc 100644
--- a/Themes.md
+++ b/Themes.md
@@ -30,3 +30,6 @@ it will change to
 
 **{$_c}** are config variable, key values from table **tbl_appconfig**
 
+## Theme Modification
+
+if you just want to change some default theme, just copy the file to **ui/ui_custom**, then edit it