Quick marker system: the dev miniguide
The most recent PC #21 Update has brought a bunch of changes to the game, also the game dev team decided to integrate the presented in the #20 Update marker system, which has been postponed for further improvement. Here's the mini guide presented by the game developers.
The in-game marker system has received a new upgrade in PC Update #21.— PUBG (@PUBG) September 14, 2018
Players now have the option of temporarily marking a direction while outside of the map screen. This allows you to quickly communicate with your team without losing focus of your target. pic.twitter.com/29sYqupbo2