guide on how to use Sony PS4 Pro dualshock controller plse?

[Android Central Question]

am totally new to PS4 games so basically i am trying to figure out how to use the dualshock controller effectively when instructions pop up on screen during the game ; the buttons with shapes are ok but i am not sure how to locate / use the controller's buttons when codes pop up on the tv screen during games such as L1 , R2 & etc.

can point me to any available guides, cheat sheets , mags / books on using PS4 Pro controllers...thks.