iPhone Any way to increase brightness with a shortcut when screen is dark?

[iBug2]

I sometimes dim the display to 0 brightness. But then when I am out in sunlight again, I want to reset to normal brightness but cannot find the buttons easily since I cannot see them now. Is there a way to increase brightness with a shake gesture for example? Any clever solutions are wellcome.

 

[cyb3rdud3]

I just tried it using the control panel. Top right swipe down. Even when it is turned down fully that control remains visible. I would just use that.