diff --git a/Selection-code.md b/Selection-code.md
index 7d9815e..46cf02d 100644
--- a/Selection-code.md
+++ b/Selection-code.md
@@ -2,7 +2,12 @@ The selection code is a set of C++ scripts. First, the running of the code is in
 
 ## Setting up ROOT
 **TODO**
-
+In order to make pretty plots, dedicated code in [Design.cpp|Design.cpp] is always checked for compilation when starting ROOT. This is done by creating a `.rootrc` file in your home directory and telling ROOT to always compile the Design.cpp:
+```
+{
+gROOT->ProcessLine(".L path/to/your/folder/Design.cpp+");
+}
+```
 # 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.