organising_data/Key-value-pairs.md

@@ -11,7 +11,9 @@ For example:
 
 There are 4 ways add key-value pairs:
 
-## 1. [Manually](./kv_add_manual)
-## 2. [Through the Description](./kv_add_global)
-## 3. [By filename convention](./kv_add_filename)
-## 4. [From .csv file](./csv/Managing-Key-values-with-csv-files)
\ No newline at end of file
+### 1. [Manually](./kv_add_manual)
+### 2. [Through the Description](./kv_add_global)
+### 3. [By filename convention](./kv_add_filename)
+### 4. [From .csv file](./csv/Managing-Key-values-with-csv-files)
+
+# Mandatory Key-Value pairs