The HUD in Counter-Strike: Global Offensive is one of the most remarkably useful tools ever thrown into a multiplayer shooter -- yet time after time, even amongst those in the lofty ranks of Global Elite or Supreme First Master Class, players make mistakes or misread situations because they failed to pick up on a piece of information that was sitting right in front of them.
Those that don't read their radar are the worst offenders. The game is literally telling you where the enemy was. But there is a valid reason for why people get confused -- they simply haven't optimised the radar, or their HUD in general.
Clutch Round has put together a visual guide and walkthrough on optimising your radar from the default settings to ones that maximise the amount of information -- and your ability to parse it on the fly. You can see the rough difference below:
"Professional players are constantly looking on it to get an overview about the current situation and to decide if they need to rotate," the site writes. There's also good instructions on why you should never have the radar centred on your player character, an incredibly wasteful setting that should be disabled even for those playing CS:GO for the first time.
They also add that you jump into a local server -- basically play offline, without bots -- to test the settings "calmly". Whether the irony was intentional though, considering CS:GO players' penchant to rage at the drop of a hat, I'm not sure.