The process holds a user session and the screen the launch left in front
is on top of the process's screen stack — the first screen, or the launch's
splash when the declaration brings one. Screen is the union of their handle
types (the identity, data and actions each holds), told apart by id, so
root.screen continues from where the launch left the process: a splash's
close returns the first screen's handle; input is what the caller
launched with.
The process holds a user session and the screen the launch left in front is on top of the process's screen stack — the first screen, or the launch's splash when the declaration brings one.
Screenis the union of their handle types (the identity, data and actions each holds), told apart byid, soroot.screencontinues from where the launch left the process: a splash'sclosereturns the first screen's handle;inputis what the caller launched with.