diff --git a/scanslicer/controller.py b/scanslicer/controller.py
index 49d648d..9f333e5 100644
--- a/scanslicer/controller.py
+++ b/scanslicer/controller.py
@@ -6,3 +6,11 @@ from .controller_status import ScanSlicerStatusMixin
 
 
 # ScanSlicerControllerMixin: class definition for ScanSlicer behavior.
+class ScanSlicerControllerMixin(
+    ScanSlicerStatusMixin,
+    ScanSlicerCanvasActionsMixin,
+    ScanSlicerDetectionMixin,
+    ScanSlicerImageIOMixin,
+    ScanSlicerParamsMixin,
+):
+    """Composed controller mixin split by responsibility."""