diff --git a/labelme/widgets/canvas.py b/labelme/widgets/canvas.py
index a78f073d3..0bdab1ea7 100644
--- a/labelme/widgets/canvas.py
+++ b/labelme/widgets/canvas.py
@@ -342,7 +342,12 @@ def mouseMoveEvent(self, ev):
                 self.hEdge = None
                 shape.highlightVertex(index, shape.MOVE_VERTEX)
                 self.overrideCursor(CURSOR_POINT)
-                self.setToolTip(self.tr("Click & drag to move point"))
+                self.setToolTip(
+                    self.tr(
+                        "Click & Drag to move point\n"
+                        "ALT + SHIFT + Click to delete point"
+                    )
+                )
                 self.setStatusTip(self.toolTip())
                 self.update()
                 break
@@ -354,7 +359,7 @@ def mouseMoveEvent(self, ev):
                 self.prevhShape = self.hShape = shape
                 self.prevhEdge = self.hEdge = index_edge
                 self.overrideCursor(CURSOR_POINT)
-                self.setToolTip(self.tr("Click to create point"))
+                self.setToolTip(self.tr("ALT + Click to create point"))
                 self.setStatusTip(self.toolTip())
                 self.update()
                 break
@@ -466,13 +471,11 @@ def mousePressEvent(self, ev):
                         self.drawingPolygon.emit(True)
                         self.update()
             elif self.editing():
-                if self.selectedEdge():
+                if self.selectedEdge() and ev.modifiers() == QtCore.Qt.AltModifier:
                     self.addPointToEdge()
-                elif (
-                    self.selectedVertex()
-                    and int(ev.modifiers()) == QtCore.Qt.ShiftModifier
+                elif self.selectedVertex() and ev.modifiers() == (
+                    QtCore.Qt.AltModifier | QtCore.Qt.ShiftModifier
                 ):
-                    # Delete point if: left-click + SHIFT on a point
                     self.removeSelectedPoint()
 
                 group_mode = int(ev.modifiers()) == QtCore.Qt.ControlModifier