Each option of this menu corresponds to an object type involved in a SSG:
program,
program template,
transaction template.
Each of these options opens a dialog box which is used to work with:
the list of repository objects (corresponding to the selected options) attached to the current application area;
the list of repository objects which can be attached to the current application area (i.e. private objects attached to no particular application area or public objects).
Click here for detailed information about the Repository dialog box.