diff --git a/scanslicer/controller_params.py b/scanslicer/controller_params.py
new file mode 100644
index 0000000..5a04a97
--- /dev/null
+++ b/scanslicer/controller_params.py
@@ -0,0 +1,4 @@
+from PySide6.QtWidgets import QComboBox, QInputDialog, QMessageBox, QSlider
+
+
+# ScanSlicerParamsMixin: class definition for ScanSlicer behavior.