hi there, i would like u to talk in general about those headlines of codes that could be used during the 3D printing process and u can add more head lines if u need to, but please make sure that u have a title for each graph and again u can use the titles that im giving to u : 1-3D Printing Codes: 2- Introduction: 3- Type of codes: 4- G Codes: 5- Arduino Codes: .