diff --git a/CCDpanelsetup.py b/CCDpanelsetup.py
index 0b9b8c4..13ef5bf 100644
--- a/CCDpanelsetup.py
+++ b/CCDpanelsetup.py
@@ -39,7 +39,7 @@ import CCDfiles
 #jfs 
 from JFSphoto import *
 import time
-
+from JFShelp import *
 
 class buildpanel(tk.Frame):
   def __init__(self, master, CCDplot, SerQueue,JFSphoto):
@@ -300,6 +300,8 @@ class buildpanel(tk.Frame):
         self.jfstitel.grid(row=device_row,column=4,columnspan=2,sticky='w')
         self.jfs4cal = tk.Button(self,text='Calibration',fg="blue", command=self.jf.do_calibrate)
         self.jfs4cal.grid(row=device_row+1,column=4,sticky='e',padx=4)
+        self.jfs4calhp = tk.Button(self,text='?',command=lambda roots=self, helpfor=1: jfshelpme(roots,helpfor))
+        self.jfs4calhp.grid(row=device_row+1,column=5,sticky='e',padx=4)
         self.jfs4nm_check = tk.Checkbutton(self,text="[nm] scale on/off",variable=self.jf.nm_checked,command=lambda CCDplot=CCDplot: self.updateplot(CCDplot))
         self.jfs4nm_check.grid(row=shicg_row-1,column=4,sticky='w',padx=4)
         self.jfsdark = tk.Button(self,text='save Darkline',fg="blue", command= darkline)
diff --git a/JFShelp.py b/JFShelp.py
index 6ec6442..614c5f8 100644
--- a/JFShelp.py
+++ b/JFShelp.py
@@ -69,6 +69,8 @@ def jfshelpme(win,helpfor):
     photoImg2= ImageTk.PhotoImage(image2)
     image3 = Image.open(file_path+'kinetics.gif')
     photoImg3= ImageTk.PhotoImage(image3)
+    image4 = Image.open(file_path+'xenon.gif')
+    photoImg4= ImageTk.PhotoImage(image4)
 
     text.tag_configure('it', font=('Arial', 10, 'italic'))
     text.tag_configure('h1', font=('Verdana', 16, 'bold'))
@@ -89,6 +91,28 @@ def jfshelpme(win,helpfor):
         text.insert(tk.END,"\n\nKinetic\n",'h2')
         text.insert(tk.END,"\nThe instrument can messure in specific intervalls over time the change in absorbance. From this data it is possible to determine the rate of the reaction.\n")
         text.image_create(tk.END,image=photoImg3)
+        text.insert(tk.END,"\n Baseline\n",'h1')
+        text.insert(tk.END,"\nIn order to messure the absorption of a compound in the cuvette, you have to messure the intensity of the the light passing through the reference cell.\n")
+        text.insert(tk.END,"The intensity of the light at a specific wavelength depends on the kind of lightsource. The spectrum of a tungstone lamp is different from a LED etc.\n")
+        text.insert(tk.END,"\nTo make things easy: the value <threshold for the baseline> cuts off the beginning and the end where the lightsource is not strong enought to give reasonable results ")
+        text.image_create(tk.END,image=photoImg4)
+        text.insert(tk.END,"\nFor example xenon-lamp as a source. If the value of the threshold is set to 100 (green), the baseline will start at 380nm and end at 510nm\n")
+        text.insert(tk.END,"If the value of the threshold is set to 50 (red), the baseline will start at 370nm and end at 695nm. The baseline determines the range of messurement\n")
+    
+    elif (helpfor == 1): #do you need help with the device?
+        text.image_create(tk.END,image=photoImg)
+        text.insert(tk.END, " Calibration\n", 'h1')
+        text.insert(tk.END, "\nTo calibrate the Instrument we need two laserpointer of different colors und known wavelength.\nFor example a blue [405nm] and red [650nm] one.\n")
+        text.insert(tk.END, "1) First take two messurements with your device und save the files with the [Save] button under a comprehensible name (e.g. 405nm.data) \n")
+        text.insert(tk.END, "2) Open the calibration dialog and insert the wavelength in [nm] and afterwards select the respective file. <first peak> stands for the lower and <second peak> for the higher wavelength.\n")
+        text.insert(tk.END, "3) Now you can use the [Calibrate] button to calibrate the instrument and [Save Config] will the store the configuration.\n")
+        text.insert(tk.END,"\nAfter this procedure you can switch the [nm] scale on and use other option:\n")
+        text.insert(tk.END,'\nMethods\n','h2')
+        text.insert(tk.END,"\nAs a Photometer to messure the transmittance or absorbance depending on the concentration of colored compounds.\n\n")
+        text.image_create(tk.END,image=photoImg2)
+        text.insert(tk.END,"\n\nKinetic\n",'h2')
+        text.insert(tk.END,"\nThe instrument can messure in specific intervalls over time the change in absorbance. From this data it is possible to determine the rate of the reaction.\n")
+        text.image_create(tk.END,image=photoImg3)
     ### at the end
     text.config(state=tk.DISABLED)
     top.focus_set()
diff --git a/images/xenon.gif b/images/xenon.gif
new file mode 100644
index 0000000..0e94afe
Binary files /dev/null and b/images/xenon.gif differ