diff --git a/clusterview/opengl_widget.py b/clusterview/opengl_widget.py
index 9d0458d..dbfd071 100644
--- a/clusterview/opengl_widget.py
+++ b/clusterview/opengl_widget.py
@@ -307,10 +307,6 @@ def highlight_selection():
     Given the current move bounding box, highlights any points inside it.
     """
 
-    # TODO: There's an edge case here
-    #       The edge case is that if you click and drag up top_left becomes
-    #       bottom right so there must be a condition where they should be
-    #       swapped.
     top_left = get_bb_top_left()
     bottom_right = get_bb_bottom_right()
 
diff --git a/clusterview/points.py b/clusterview/points.py
index 25bdb38..33e2ab5 100644
--- a/clusterview/points.py
+++ b/clusterview/points.py
@@ -145,6 +145,13 @@ class PointSet:
     def point_size(self):
         return self.__point_size
 
+    def clear_selection(self):
+        """
+        Handy helper function to clear all selected points.
+        """
+        for p in self.__points:
+            p.unselect()
+
     def add_point(self, x, y, attrs=[]):
         """
         Adds a point in screen coordinates and an optional attribute to
diff --git a/tests/test_point_set.py b/tests/test_point_set.py
index a5c31c4..adc7997 100644
--- a/tests/test_point_set.py
+++ b/tests/test_point_set.py
@@ -83,3 +83,30 @@ def test_attributes_must_be_array_of_attributes():
     with pytest.raises(ValueError):
         l = PointSet(8)
         l.add_point(1, 2, attrs=[1,2,3,4,5])
+
+
+def test_clear_all_selected_points():
+    l = PointSet(8)
+    l.add_point(1, 2)
+    l.add_point(3, 4)
+
+    for p in l.points:
+        p.select()
+
+    selected = 0
+
+    for p in l.points:
+        if p.selected:
+            selected += 1
+
+    assert selected == 2
+
+    l.clear_selection()
+
+    unselected = 0
+
+    for p in l.points:
+        if not p.selected:
+            unselected += 1
+
+    assert unselected == 2