There are three modes the Leaderboard can use.
Highest - Displays the players highest score out of all attempts made.
Initial - Displays only the first score a player gets regardless how many times they play.
All - Shows the sum of all scores a player achieves.
Leaderboard Point Factor
The point factor multiplies points earned within an activation for the leaderboard score. Example if this is set for 100, and a player gets 400 in Swervy Bird, their leaderboard score will be 40000 (400 * 100).
Share points with my global leaderboards
Lets you add this games leaderboard into a global leaderboard you have setup.
Share points with external global leaderboards
Lets you add this games leaderboard into another clients leaderboard. Useful if an event has an overall leaderboard, while exhibitors have their own personal activations & leaderboards.