diff --git a/cfg/gui-b.mueller.cfg b/cfg/gui-b.mueller.cfg
new file mode 100644
index 0000000..310acbb
--- /dev/null
+++ b/cfg/gui-b.mueller.cfg
@@ -0,0 +1,4 @@
+[Fenster]
+CanvasBreite=1080
+CanvasHoehe=1920
+Dimension=1080x1920
\ No newline at end of file
diff --git a/lib/manage_configs.py b/lib/manage_configs.py
index 188611a..099742e 100644
--- a/lib/manage_configs.py
+++ b/lib/manage_configs.py
@@ -487,7 +487,13 @@ class InvaldCharsConfig():
 class GuiConfig(IniBasedConfig):
     """Auslesen der Zusatzinformationen die aus dem Änderungsindex abgeleitet werden"""
     def __init__(self, config_dir='.', config_file='gui.cfg'):
-        super().__init__(config_dir, config_file)
+        username = os.environ.get("USERNAME")
+        spezific_file = 'gui-' + username + '.cfg'
+        spezific_path = os.path.join(config_dir,spezific_file)
+        if os.path.exists(spezific_path):
+            config_file=spezific_file
+        super().__init__(config_dir, config_file=config_file)
+
 
 class Configs:
     """Sammlung aller Configdateien """