SAP NetWeaver AS ABAP Release 740, ©Copyright 2014 SAP AG. All rights reserved.
ABAP Keyword Documentation → ABAP − Reference → User Dialogs → Screens → Statements in the Screen Flow Logic →Subscreens, Tabstrips, and Splitter Controls
Subscreens are screens of special subscreen dynpros that can be included in other dynpros. Subscreens are either included directly, or using special controls.