User`s guide

A-2
Appendix A - [:INUM] - Integer Numeric Fields
INCRement Sets and queries the field’s current INCRement value.
INCRement <UP | DOWN | (value)>
INCRement <value> sets the field INCRement value. INCR UP or
INCR DOWN cause the field to be modified up or down by the
current INCRement value.