You may never have to create a proposal, but you will have to use APT when you do make small changes to a proposal. ... APT Training Materials . ... Watch or read the following sections in the APT Training Materials: General APT Training Materials, Aladin Interface Training Materials, and Phase II Specific APT Training Materials. Use APT to create a basic WFC3 program with M31 as the target. ... Use the APT Training Materials to help you create the patterns and POS TARGs. ...