diff --git a/scanslicer/canvas_interaction.py b/scanslicer/canvas_interaction.py
new file mode 100644
index 0000000..59b707e
--- /dev/null
+++ b/scanslicer/canvas_interaction.py
@@ -0,0 +1,5 @@
+import numpy as np
+from PySide6.QtCore import QPointF, Qt
+
+
+# CanvasInteractionMixin: class definition for ScanSlicer behavior.