ISPF provides an action bar-driven interface that exploits many of the usability features of Common User Access (CUA) interfaces. For more information about CUA, see Object-Oriented Interface Design: IBM Common User Access Guidelines.
These action bars give you another way to move around in ISPF, as well as the ability to nest commands. Command nesting allows you to suspend an activity while you perform a new one rather than having to end a function to perform another function.
This chapter primarily explains the action bar-driven interface and the use of ISPF's graphical user interface (GUI). If you use a non-programmable terminal to access ISPF and you do not want to use the command nesting function, you can make selections by typing in a selection number and pressing Enter.