How to adjust temperature of Eleaf iStick Pico

In TC-Ni/TC-Ti/TC-SS/TCR(M1, M2, M3) mode of Eleaf iStick Pico, temperature can be adjusted from 100-315 ℃ or 200-600 ℉ by pressing up button or down button, up button to increase and down button to decrease. Each press of the up or down button will increase or decrease the temperature setting by 5℃ or 10℉. Keep pressing up button or down button without looseness can rapidly increase or decrease temperature setting.