Tracking the Transaction Code for the IMG activities

Go to SPRO -> SAP Reference IMG  

Now click on “Additional Information” à Additional information à Display Key à IMG Activity

 

You would see the activity names on every transaction in IMG now (as shown below)

 

Note the corresponding activity.  

Now to transaction SE16 and enter the name CUS_IMGACH  

Enter the activity name as shown below:

 

Execute and you would get the transaction code