Epson 20 - Manual (Page 63)

Key functions
Key
Tab
Caps Lock
Purpose
Moves the cursor one tab to the right in normal mode
and one tab to the left in shift mode.
Changes the letter keys from lower- to uppercase;
changes back to lowercase when pressed again. The
numeric/symbol keys on the top row of the keyboard
are not affected.
Shift Produces uppercase characters or the top symbols
on the keys when used with the main character keys.
Produces lowercase characters when Caps Lock is
on.
Ctrl
Alt
Works with other keys to perform special (control)
functions, such as editing operations in MS-DOS and
GW-BASIC.
Works with other keys to enter alternate character
codes or functions.
Backspace
Enter
Moves the cursor back one space, deleting the
character to the left of the cursor.
Ends a line of keyboard input or executes a
command.
Insert (Ins) Turns the insert function on and off.
Delete (Del) Deletes the character marked by the cursor.
4-6 Using the Equity 386