private void flipDistButton_Click(object sender, EventArgs e) { LegFace face = CurrentFace; if (face == null) { return; } m_Edits.FlipLegAnnotations(m_CurFaceIndex); foreach (SpanInfo span in face.Spans) { if (span.HasLine) { span.ObservedDistance.ToggleIsFlipped(); } } m_UpdCmd.ErasePainting(); }