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Editing Using 3270 Hardware Facilities

Editing keys affect the field where the cursor is found. Each line in the region can contain various fields. For example, each line of a program working data definition contains seven fields. Each line of a program procedure contains two fields‑the text field and the sequence number and command field.

ERASE EOF Key

When the cursor is in a display area field, erases data following the cursor to the end of the field.

Erasing a sequence number with the EOF key has no effect. If you erase the entire text field on a line with the EOF key, any line commands specified in the sequence number and command field on the line are ignored.

DELETE Key

Deletes characters and spaces one at a time at the cursor, while shifting data from the right and leaving null characters in the right‑most columns of the field.

INSERT Key

Lets you enter characters in a field in the column containing the cursor. Each character entered shifts existing data one column to the right and replaces a null character to the right of the cursor until no null characters remain in that field.

Alphanumeric and special character keys

Enters the character represented on the key into the field in the column containing the cursor.

Tab keys

• Forward Tab-Positions the cursor to the beginning of the next field.
• Back Tab-Positions the cursor to the beginning of the current field or, if the cursor is at the beginning of the current field, the back tab positions the cursor to the beginning of the previous field.