diff --git a/swissmx.py b/swissmx.py
index ea0447a..038d91d 100755
--- a/swissmx.py
+++ b/swissmx.py
@@ -1436,6 +1436,16 @@ class WndSwissMx(QMainWindow, Ui_MainWindow):
         if t==UsrGO.FixTargetFrame:
           pos=np.array(param['grid']['pos']) #in um
           pitch=np.array(param['grid']['pitch']) #in um
+          #TODO !!!
+          #input grid coordinate output um
+          trf2=np.asmatrix(np.identity(3))
+          trf2[:, :2]=param['trf']
+          trf2*=np.asmatrix(((-1000, 0, 0), (0, 1000, 0), (0, 0, 1)))
+          trf3=np.asmatrix(((pitch[0], 0, 0), (0, pitch[1], 0), (pos[0], pos[1], 1)))
+          trf2=(trf3*trf2)[:,:2]
+          p2=(np.asmatrix((0,0,1))*trf2).A
+          p2=(np.hstack((param['points'],np.ones((p.shape[0],1))))*trf2).A
+
           m=np.hstack((p*pitch+pos,np.ones((p.shape[0],1))))
           p=(np.asmatrix(m)*trf).A
           param['pts_trf']=p # transformed points