Update 'Selection code'

Selection-code.md

@@ -22,11 +22,37 @@ gROOT->ProcessLine(".L path/to/your/folder/Design.cpp+");
 ```
 source  /cvmfs/sft.cern.ch/lcg/views/setupViews.sh LCG_97python3 x86_64-centos7-gcc9-opt
 ```
-
 ## General remarks
 
-Verbosity **TODO** 
+The code is a long series of tweaks, be patient when something is not ideal. 
-Run = 0 means do it per year **TODO**
+
+#### Input parameters 
+
+Generally, the input parameters are 
+
+ * **string magnet**\
+     Refers to the polarity of the sample, it is either "down" or "up"
+ * **string year**\
+     Year of the sample, 2011, 2012, 2015, 2016, 2017 or 2018
+ * **int Run**\
+     * 0: run the function per given year and not run
+     * 1: 2011+2012
+     * 2: 2015+2016+2017+2018
+     * 12: Both runs
+ * **bool MC**\
+     false = use data\
+     true = use MC 
+ * **bool ReferenceChannel**\
+     false = use the signal Q2 region\
+     true = use the Jpsi Q2 region
+ * **bool PHSP**\
+      false = do not use PHSP MC\
+      true = use PHSP MC\
+
+### Verbosity
+
+There are 5 levels of verbosity: The level of verbosity is defined in [GlobalFunctions.hh](https://git.physi.uni-heidelberg.de/kopecna/EWP-BplusToKstMuMu-AngAna/wiki/GlobalFunctions.hh#output-levels). The default level is \[INFO\], corresponding to level 2.
+
 
 # Running the code
 The code consists of several C++ scripts that are compiled and executed in ROOT. Before every step, it is worth closing and opening ROOT, as it is possible ROOT will complain about redefinition of functions.