Name

about:repl-keyboard-shortcuts

Description

Non-trivial Editor Keys:

ENTER           Execute input when it is a complete lisp expression,
                otherwise add a LF to the command string and continue editing.
F12             Execute input after surrounding it in parentheses.
TAB             Show completion list for the symbol before the cursor.
ESC             Cancel input.
UP              Move up in history.
DOWN            Move down in history.
CTRL+V          Paste source code from the clipboard into the REPL.
CTRL+W          Delete word before the cursor.
CTRL+U          Erase to the begin of the line.
CTRL+K          Erase to the end of the line.
CTRL+L          Erase screen and cancel input.

Your terminal program provides scrolling through the scrollbars.