Newline() action

In 3270 mode, the Newline action emulates the New Line (↲) key on the 3270 keyboard It moves the cursor to the leftmost position of the leftmost modifiable field below the current cursor position, wrapping from the bottom of the screen to the top if necessary.

In NVT mode, it sends a Line Feed (U+000A) to the host.

Examples
Newline

Default keymap
how to read keymap tables