diff --git a/pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/PdfUmbenennerGuiApplication.java b/pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/PdfUmbenennerGuiApplication.java
index d31d04b..ff824ae 100644
--- a/pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/PdfUmbenennerGuiApplication.java
+++ b/pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/PdfUmbenennerGuiApplication.java
@@ -58,6 +58,7 @@ public class PdfUmbenennerGuiApplication extends Application {
         // Install the close-request handler that protects unsaved changes.
         workspace.installCloseRequestHandler(primaryStage);
 
+        primaryStage.setMaximized(true);
         primaryStage.show();
 
         LOG.info("GUI: Hauptfenster erfolgreich angezeigt.");