Using The Special Function Keys - Epson HX-20 Operation Manual

Your HX-20 contains eight special function keys, labelled as
follows:
52
Display leftmost portion of virtual screen.
Scroll right.
Delete from cursor to end of logical line.
Move cursor to rightmost portion of virtual
screen.
Same as
Horizontal tab (8 columns).
Move cursor down by one line. (Has no
effect in BASIC immediate mode.)
Home the cursor.
Clear virtual screen and home the cursor.
Carriage return.
Scroll text down by four lines, or by amount
set with BASIC SCROLL command.
Scroll text up by four lines, or by amount
set with BASIC SCROLL command.
Enter insert mode, or exit from insert mode.
Scroll left.
Make cursor visible.
Make cursor invisible.
Delete from cursor to end of virtual screen.