These statistics track the occurrence of combinations of odd/even numbers and low/high numbers.
Ticket 1-2-3-4-5-6 has 3 odd numbers and 3 even numbers. All its numbers are low. So the Odd/Even + Low/High column in e.g. Package Properties window shows value 3:3 - 6:0 for this ticket.
The latest winning numbers in Expert Lotto 6/49 Demo Lottery are 23-29-36-42-44-47-[07]. Three numbers are odd and three numbers are even, 1 number is low (23) and five numbers are high. So the Odd/Even + Low/High column in e.g. Winning Numbers Properties window shows value 3:3 - 1:5 for this draw.
These statistics are available in summary form and also as per-ticket properties.
See also Combined Statistics and Odd/Even and Low/High ticket filters.