Adjust handicaps for course tells PlayThru to convert each golfer's handicap index into a course handicap using the slope and rating of the tee they're playing from. This is the standard USGA method and is essential when golfers play from different tees.
When this is enabled, the Course tab requires for each tee box:
And on the Golfers tab:
PlayThru calculates a course handicap from:
PlayThru uses the USGA formula:
Adj. Handicap = (Handicap Index * Slope / 113) + (Course Rating - Par)
If the applied percentage is less than 100, that adjusted handicap is multiplied by the entered percentage, and that value is used to calculate net score.
PlayThru uses the raw handicap number you enter for each golfer without adjusting for tee difficulty. This works if all golfers play the same tee or you've already converted to course handicap manually.