1 files changed, 13 insertions, 8 deletions
diff --git a/lib/Slic3r/GUI/Plater/3DToolpaths.pm b/lib/Slic3r/GUI/Plater/3DToolpaths.pm
index 0575daa84..fb904b0fd 100644
--- a/lib/Slic3r/GUI/Plater/3DToolpaths.pm
+++ b/lib/Slic3r/GUI/Plater/3DToolpaths.pm
@@ -50,14 +50,19 @@ sub new {
     });
     EVT_KEY_DOWN($canvas, sub {
         my ($s, $event) = @_;
-        
-        my $key = $event->GetKeyCode;
-        if ($key == 85 || $key == 315) {
-            $slider->SetValue($slider->GetValue + 1);
-            $self->set_z($self->{layers_z}[$slider->GetValue]);
-        } elsif ($key == 68 || $key == 317) {
-            $slider->SetValue($slider->GetValue - 1);
-            $self->set_z($self->{layers_z}[$slider->GetValue]);
+        if ($event->HasModifiers) {
+            $event->Skip;
+        } else {
+            my $key = $event->GetKeyCode;
+            if ($key == 85 || $key == 315) {
+                $slider->SetValue($slider->GetValue + 1);
+                $self->set_z($self->{layers_z}[$slider->GetValue]);
+            } elsif ($key == 68 || $key == 317) {
+                $slider->SetValue($slider->GetValue - 1);
+                $self->set_z($self->{layers_z}[$slider->GetValue]);
+            } else {
+                $event->Skip;
+            }
         }
     });