diff --git a/MassFit.cpp.md b/MassFit.cpp.md
index c913a85..2ba9158 100644
--- a/MassFit.cpp.md
+++ b/MassFit.cpp.md
@@ -1,10 +1,35 @@
 
 
+# Classes
+### TMefficiencyClass
+* **Private members:**
+* **Public  members:**
+    * string sVariable
+    * std::vector\<string>sBranchName
+    * Int_t Bins
+    * Float_t Range\[2\]
+    * std::vector\<std::array\<double,2>> vVarRange
+    * std::vector\<double> binEdges
+    * std::vector\<double> binEdgesEquidistant
+    * bool isEquidistant
+    * Float_t Step
+    * string cut
+    * 
+* **Functions:**
+    * **TMefficiencyClass()**
+        * **Parameters**
+            * //default constructor
+        * **Return**
+
+
+    
 # Functions and their parameters:
-### bool useExtraVarBool()
 
+
+### bool useExtraVarBool()
+This functions checks whether the used extra variable is listed in the binning scheme defined in the TMefficiencyClass. **ṪODO** add a link
 * **Parameters**
-    * string extraVar //Shoudl be easy to add others
+    * string extraVar
 * **Return**
 
 ### string GetsWeightPlots()