HTML
(quick & simple examples)
INSERT THIS VIEWPORT META TAG INTO THE <HEAD> SECTION.
<meta name="viewport" content=" SET TO DEVICE WIDTH width=device-width, INITIAL AND MAX ZOOM 1.0X initial-scale=1.0, maximum-scale=1.0, NO SCALE/ZOOM ALLOWED user-scalable=no "/>
BECAUSE NOT EVERYONE HAS PERFECT EYESIGHT.
<meta name="viewport" content=" SET TO DEVICE WIDTH width=device-width, INITIAL ZOOM 1.0X initial-scale=1.0, MAX ALLOWED ZOOM 2.0X maximum-scale=2.0 "/>