Players can choose to use either the white tees or the yellow tees in the one competition. When you get your card from the shop let them know which tees you will be using, you must play from the same colour tees all through the round. 

When you enter your score on the computer you will mark the colour tee you used then enter your score as normal.

This is a stableford scoring competition and you can use the IG app in the Handicap Record - Calculator tab to see the handicap that will apply to each colour tee, but if you make a mistake you will see the correct score for a hole on the computer and you can correct it on the card.