Siemens SIMATIC VPU200 Programming Manual page 49

The function keys which appear after the EDIT function
key is pressed depends on the command which is being
edited. For * (comment), IF, IMATH, MATH, and PRINT
commands, the following function keys appear:
These keys are used to manipulate lines and characters.
The DELCH function key deletes the character under the
cursor. The INSCH function key allows characters to be
inserted. (Characters will continue to be inserted until the
INSCH function key is pressed again or you quit the EDIT
operation.) The DELLN deletes the line on which the cursor
is placed. The INSLN inserts a line before the line on which
the cursor is placed.
For the PACK command, the following function keys are
available:
For the ELSE, ENDIF, and RETURN commands, the
following function keys are available:
SIMATIC VPU200/565 Programming Manual Programming Special Functions 6-7