diff --git a/ParserKrokiTag.php b/ParserKrokiTag.php
index 557a8e9..f0826d5 100644
--- a/ParserKrokiTag.php
+++ b/ParserKrokiTag.php
@@ -240,8 +240,20 @@ class ParserKrokiTag {
 
 		$width = $args['width'] ?? '';
 		$height = $args['height'] ?? '';
+		
+		$external_width = $args['external_width'] ?? $width;
+		$external_height = $args['external_height'] ?? $height;
+		$internal_width = $args['internal_width'] ?? $width;
+		$internal_height = $args['internal_height'] ?? $height;
 
-		return self::formatHtml( "data:image/" . $output_format . "+xml;base64," . base64_encode( $request->getContent() ), $width, $height, $lang );
+		return self::formatHtml( 
+			"data:image/" . $output_format . "+xml;base64," . base64_encode( $request->getContent() )
+			,$external_width
+			,$external_height
+			,$internal_width
+			,$internal_height
+			,$lang
+		);
 	}
 
 	/**
@@ -334,8 +346,20 @@ class ParserKrokiTag {
 		if ( $graphFile->exists() ) {
 			$width = $args['width'] ?? '';
 			$height = $args['height'] ?? '';
+			
+			$external_width = $args['external_width'] ?? $width;
+			$external_height = $args['external_height'] ?? $height;
+			$internal_width = $args['internal_width'] ?? $width;
+			$internal_height = $args['internal_height'] ?? $height;
 		
-			return self::formatHtml( $graphFile->getUrl(), $width, $height, $lang );
+			return self::formatHtml( 
+				$graphFile->getUrl()
+				,$external_width
+				,$external_height
+				,$internal_width
+				,$internal_height
+				,$lang
+			);
 		}
 
 		$tmpFactory = MediaWikiServices::getInstance()->getTempFSFileFactory();
@@ -356,20 +380,39 @@ class ParserKrokiTag {
 		$width = $args['width'] ?? '';
 		$height = $args['height'] ?? '';
 		
-		return self::formatHtml( $graphFile->getUrl(), $width, $height, $lang );
+		$external_width = $args['external_width'] ?? $width;
+		$external_height = $args['external_height'] ?? $height;
+		$internal_width = $args['internal_width'] ?? $width;
+		$internal_height = $args['internal_height'] ?? $height;
+		
+		return self::formatHtml( 
+			$graphFile->getUrl()
+			,$external_width
+			,$external_height
+			,$internal_width
+			,$internal_height
+			,$lang
+		);
 	}
 
 	/**
 	 * Formats the HTML for displaying an image.
 	 *
 	 * @param string $imgUrl The URL of the image.
+	 * @param string external_width maximum width of scrolling zone
+	 * @param string external_height maximum height of scrolling zone
+	 * @param string internal_width maximum width of image
+	 * @param string internal_height maximum height of image 
+	 * @param string diagram type
 	 * @return string The formatted HTML code.
 	 */
-	private static function formatHtml( string $imgUrl, string $width, string $height, string $lang ): string {
+	private static function formatHtml( string $imgUrl, string $external_width, string $external_height, string $internal_width, string $internal_height, string $lang ): string {
 		return Html::rawElement(
-			'div',
-			[ 'class' => self::KROKI_CSS_CLASS ],
-			Html::element( 'img', [ 'src' => $imgUrl, 'width' => $width, 'height' => $height, 'style' => 'background-color: rgba(150, 150, 150, 0.5);' ] )
+			'div', [ 'style' => 'overflow:hidden;', 'width' => $external_width, 'height' => $external_height ],
+			Html::rawElement(
+				'div', [ 'class' => self::KROKI_CSS_CLASS, 'style' => 'overflow-y:scroll;' ],
+				Html::element( 'img', [ 'src' => $imgUrl, 'style' => 'background-color: rgba(150, 150, 150, 0.5);', 'width' => $internal_width, 'height' => $internal_height ] )
+			)
 		);
 	}