Refresh Dice

I am having problems finding how to do this easy task, it must be in the software somewhere I click on the dice in the seating planner and everytime a student has been picked an icon of a dice comes up against their name. When I reload the seating plan, the dice icons are still there, how can I reset them so all students are back to a blank canvas for question time in other lessons.

Thanks for any help....

Hello AndyPaul,
Here it is.
If you do not want those dices to appear, tap on the gear icon and disable the 'Show who's been picked' option.