diff --git a/FCNC-Fitter.md b/FCNC-Fitter.md
index 8e4b2ee..8d60b3b 100644
--- a/FCNC-Fitter.md
+++ b/FCNC-Fitter.md
@@ -40,6 +40,16 @@ set(SPDLOG_INCLUDE_DIR "$/yourPath/spdlog/include/")
 set(SPDLOG_INCLUDE_DIR_TWO "/yourPath/spdlog/include/spdlog/")
 ```
 
+## Output
+
+There are possible 6 levels of verbosity
+ * 0) Trace
+ * 1) Debug
+ * 2) Info
+ * 3) Warning
+ * 4) Error
+ * 5) Critical
+ 
 
 ## File structure
 Currently, the file structure is as follows. All the `.cc` source files also have their corresponding header with the same `name.hh`.