diff --git a/BackgroundPdf-Class.md b/BackgroundPdf-Class.md
index 5335b5e..ab6ea03 100644
--- a/BackgroundPdf-Class.md
+++ b/BackgroundPdf-Class.md
@@ -6,49 +6,54 @@
 
 # Classes
 ### BackgroundPdf: public ParamValues
-* **Private members:**
+Contains thhe constrained parameters, the pdf of the constrained paramerers, bool AtLeastOneConstrainFound, the RooFit funtions of (exponential, second exponential, ExpGaus function, Double Crystal ball) and the final background model pdf.
 * **Public  members:**
+    * BackgroundPdf(){}; //default constructor
+    * RooArgSet * ConsParameter = new RooArgSet();
+    * RooArgList * ConsPDF = new RooArgList();
+    * bool AtLeastOneConstrainFound = false;
+    * RooExponential * bkg_exp1(RooRealVar *B_plus_M);
+    * RooExponential * bkg_exp2(RooRealVar *B_plus_M);
+    * RooExpAndGauss * ExpG(RooRealVar *B_plus_M);
+    * RooDoubleCB    * bkg_CB(RooRealVar *B_plus_M);
+    * RooAddPdf* getBplusBkgModel(RooRealVar *B_plus_M);    
 * **Functions:**
-    * **groundPdf()**
-        * **Parameters**
-            * }; //default constructor
-        * **Return**
+    * void setAllRooVarsConstant();
+    * ~BackgroundPdf(){}; //default destructor
 
 
 
 # Functions and their parameters:
 ### RooExponential \*  BackgroundPdf::bkg_exp1()
-
 * **Parameters**
     * RooRealVar \*B_plus_M
 * **Return**
+    * Returns RooExponential: the first exponential pdf
 
 ### RooExponential \*  BackgroundPdf::bkg_exp2()
-
 * **Parameters**
     * RooRealVar \*B_plus_M
 * **Return**
+    * Returns RooExponential: the second exponential pdf
 
 ### RooExpAndGauss \*  BackgroundPdf::ExpG()
-
 * **Parameters**
     * RooRealVar \*B_plus_M
 * **Return**
-
+    * Returns RooExpAndGauss: ExpGauss pdf
+    * 
 ### RooDoubleCB    \*  BackgroundPdf::bkg_CB()
-
 * **Parameters**
     * RooRealVar \*B_plus_M
 * **Return**
+    * Return RooDoubleCB: double crystal ball pdf 
 
 ### RooAddPdf\*  BackgroundPdf::getBplusBkgModel()
 
 * **Parameters**
     * RooRealVar \*B_plus_M
 * **Return**
+    * Returns RooAddPdf, the full background model
 
 ### void BackgroundPdf::setAllRooVarsConstant()
-
-* **Parameters**
-    * 
-* **Return**
\ No newline at end of file
+Takes all the avaialbe parameters in the background pdf and sets them to be constant.
\ No newline at end of file