diff --git a/CoLo-AT/README.md b/CoLo-AT/README.md
index 1bfb80a1794ac00eff2426b6368a5eccf514194c..7dc5c9043649baac3a217349f2a99b2c656faf75 100755
--- a/CoLo-AT/README.md
+++ b/CoLo-AT/README.md
@@ -4,7 +4,8 @@
 
 CoLo-AT is the software analysis tool of CoLo using Python. It is a robotic testing environment for cooperative localization using real world dataset[1].  Compared with other popular robotic simulation environments[2], it has fewer dependencies and more convenient to add localization algorithms without worry much about the robot settings. Moreover, it is able to use both real world data to test the robustness and liabilities of these algorithms, whereas other simulation environments use only simulated data. Users can use CoLo_AT to evaluate their algorithms using the analysis results provided by CoLo-AT
 
-[CoLo-AT Manual](https://docs.google.com/document/d/1XOe8ZwLlM2DbLjeteLUff9cUuHIKdVW1M-U7jzvrrok/edit#)
+
+## [CoLo-AT Manual](https://docs.google.com/document/d/1XOe8ZwLlM2DbLjeteLUff9cUuHIKdVW1M-U7jzvrrok/edit#)
 
 
 ## Features
diff --git a/CoLo-PE/README.md b/CoLo-PE/README.md
index 895fdf755422c795e6cad3b49df9ab2520bc0d94..ea7335be5fa192f9e968a357508cc36603f4b14a 100644
--- a/CoLo-PE/README.md
+++ b/CoLo-PE/README.md
@@ -6,8 +6,11 @@ CoLo-PE is the physical experiment of CoLo. It is a physical experiment setup fo
 
 In CoLo-PE, there is a team of ground robots equipped with cameras and a groundtruth data collection system. Each robot can will log its odometry data and measurement data (based on AruCo) into its odometry file and measurement files
 
+
+## [CoLo-PE Manual](https://docs.google.com/document/d/1tSIguoFJ5Fdcca0Eqcs4SZFRv2TBLSsm4NYaoaRcUwg/edit?usp=sharing)
 The manual will explain the software and hardware used in CoLo-PE for users to help them create their own experiments in details: 
-[CoLo-PE Manual](https://docs.google.com/document/d/1tSIguoFJ5Fdcca0Eqcs4SZFRv2TBLSsm4NYaoaRcUwg/edit?usp=sharing)
+
+
 ## Running CoLo-PE
 
 1. Make sure the groundtruth data collection system can capture all the needed subjects includes landmarks and robots