diff --git a/src/gui_qt/data/shift_graphs.py b/src/gui_qt/data/shift_graphs.py
index 61dc918..f436989 100644
--- a/src/gui_qt/data/shift_graphs.py
+++ b/src/gui_qt/data/shift_graphs.py
@@ -1,7 +1,7 @@
 import numpy as np
 from itertools import cycle
 
-from pyqtgraph import mkColor, mkPen
+from pyqtgraph import mkColor, mkPen, mkBrush
 
 from nmreval.lib.colors import Tab10
 
@@ -42,11 +42,17 @@ class QShift(QtWidgets.QDialog, Ui_shift_dialog):
 
     def add_item(self, idx, name, x, y):
         color = mkColor(next(self._colors).rgb())
-        if np.iscomplexobj(y):
-            pl = [PlotItem(x=x, y=y.real, name=name, pen=mkPen(color=color)),
-                  PlotItem(x=x, y=y.imag, name=name, pen=mkPen(color=color))]
+
+        if len(y) == 1:
+            sym_kwds = {'symbol': 'o', 'symbolBrush': mkBrush(color=color), 'symbolPen': mkPen(color=color)}
         else:
-            pl = [PlotItem(x=x, y=y, name=name, pen=mkPen(color=color))]
+            sym_kwds = {'symbol': None, 'symbolBrush': mkBrush(color=color), 'symbolPen': mkPen(color=color)}
+
+        if np.iscomplexobj(y):
+            pl = [PlotItem(x=x, y=y.real, name=name, pen=mkPen(color=color), **sym_kwds),
+                  PlotItem(x=x, y=y.imag, name=name, pen=mkPen(color=color), **sym_kwds)]
+        else:
+            pl = [PlotItem(x=x, y=y, name=name, pen=mkPen(color=color), **sym_kwds)]
 
         self.data[idx] = (pl, x, y)