On lift off, you go from TO to climb, and power is now dependent on the climb thrust you have set on the N1 LIMIT page. The actual automatic setting of climb power is dependent on when you select climb power to take effect on the TAKE OFF REF p2. This is not less than 800ft, (Auto throttle goes to ARM) and not more than (from memory) 9999ft
Setting CLB, instead of CLB-1, or CLB-2 would now give you max rated climb power, in this case 22K. Full rated climb power is indicated by CLB N1.