Type: string
Default: "%u%D%I %t%4n %T%.40d%> [%.7m/%.10M, %.6e%?C?, %C?, %s] "
This variable describes the format of the `attachment' menu. The following printf-style sequences are understood:
charset
reqiures charset conversion (n or c)
deleted flag
description
MIME content-transfer-encoding
filename
disposition (I=inline, A=attachment)
major MIME type
MIME subtype
attachment number
size
tagged flag
graphic tree characters
unlink (=to delete) flag
right justify the rest of the string and pad with character "X"
pad to the end of the line with character "X"