QR_COMPACT

Specifies whether to use compact mode for QR code (type Boolean, or "true" or "false" String value). Please note that when compaction is performed, the most compact character encoding is chosen for characters in the input that are not in the ISO-8859-1 character set. Based on experience, some scanners do not support encodings like cp-1256 (Arabic). In such cases the encoding can be forced to UTF-8 by means of the CHARACTER_SET encoding hint.