help me achieve this screen seting

[dnanick]

i would like the screen to not light up when i fire,and maybe with 3 clicks make it light up so i can see my settings and change them if needed. in short;it's like the stealth mode in the evic vmini;meaning the screen is dark but i can push the button once to see and change my settings. in the dna's stealth mode,it's a whole procedure to achieve the same while in stealth mode.(lock change to regular mode,unlock,and the same to go back to stealth.)