diff --git a/wled00/data/settings_2D.htm b/wled00/data/settings_2D.htm
index e372b3e2..29b2ec40 100644
--- a/wled00/data/settings_2D.htm
+++ b/wled00/data/settings_2D.htm
@@ -107,6 +107,7 @@ Y: <input name="P${i}Y" type="number" min="0" max="255" value="0" oninput="UI()"
 				Sf[`P${p}H`].value = ph;
 			}
 		}
+		UI(); // Update the preview after generating panels
 	}
 
 	function expand(o,i)