To add images you need to edit the player account and upload an image for the player.
This feature is only available for paid plans. Note that for player accounts that have been claimed by the player (for example by logging in to rise and verifying their email address) you will no longer be able to change their player photo.
Profile pictures should be square. They will then be resized according to the theme. Dimensions of 400px x 400px will be sufficient for most themes.
Once you have uploaded a photo, be sure to save the player account details.
The photo will then appear next to that player's name on any leaderboard or scorecard.