RECFM choices

Entries in the drop down list consists of one or more of the following characters: A, B, F, M, S, U, V. Following describes the meaning of each character:

A
Records contain ISO/ANSI control.
B
Blocked records.
F
Fixed record length.
M
Records contain machine code control characters.
S
Spanned records, if variable length. Standard, if fixed length.
U
Undefined record length.
V
Variable record length.

The default is VB (Variable Block).