Solution : https://service.sap.com/sap/support/notes/190059 (SAP Service marketplace login required)
Key words :
additional key words mrp list, current stock/requirements list, 'function activation' -> 'active <-> inactive', 'function activation' --> 'active <-> inactive', choose 'edit -> insert -> entry', open menu option 'settings', enter text 'user exit', 'function keys' option, 'menu bar' option, long-term planning
Related Notes :
| 208025 | MRP: Setting users exits, documentation |