Hi, the Sprint control should be one of the 'Shift' keys. To change the configuration, use the Raft Configuration window when you start the game. Go to the Input tab and you will see the controls of the game. Scroll down and find 'Sprint' in the Control column. Now double-click directly on the key you want to change(in either the Primary or Secondary column)and then press the key you want to use when you sprint. Hope this helps!