Hi DR,
Mainly you need to look at 3 areas. If you can not find authorization objects, please use authorization trace ST01.
1. ABAP development
2. Launchpad designer
Protecting Access to Launchpad Designer - User Interface Add-On for SAP NetWeaver - SAP Library
3. Theme designer
Prerequisites - User Interface Add-On for SAP NetWeaver - SAP Library
Regards, Masa
SAP Customer Experience group - CEG