diff --git a/docs/Waterloo-Steel:Platform-Instruction.md b/docs/Waterloo-Steel:Platform-Instruction.md
index aa89b65..b75c10c 100644
--- a/docs/Waterloo-Steel:Platform-Instruction.md
+++ b/docs/Waterloo-Steel:Platform-Instruction.md
@@ -364,6 +364,8 @@ $ roslaunch slam_gmapping.launch
 ![mapping_rviz](resources/deck/mapping_rviz.jpg)
 
 - Now, you may leash the robot slowly across the room from edge to edge.
+- Make sure to keep a distance of at least 0.5 meter between the robot and the objects you want to capture. Objects whithin this distance will not be captured.
+- Make sure your legs are not captured as an object. Therefore, stay in the blind spot of the robot, or keep walking around.
 
 ### 5.1.4 Save the Map: