It is a tool which used in pubg to modify the graphic options,with the help of this tool we can increase the game resolution and enable HDR moods.

First of all you have to go in play store and search about the GFX tool and after that download it on your device.

Now, open the GFX tool on your device after that some options will come at the top of GFX tool where you have to select the game version. 

After selecting the version a new display will show on your device where the different options will display like the first option will your :

Here many options will come like ,

(768×432),(960×540),(1024×576),(1152×648),(1280HD)

You have to select one of these.These 

can increase your game resolution.

The second option is graphic option where you have to choose best graphic regarding to your device.

On graphic option there are many graphic options are available such as:

–Smooth:

it is good for the devices which have low memory or ram. With the help of this your pubg will run smoothly.

–Balanced:

It is also for the low memory devices but you can use it for high memory device also.Your graphic will good if you choose the option of balanced.

–HD:

It is also a perfect graphic for pubg.Here the thing will seen clearly like stones,trees, buildings etc.

–HDR:

It is good for the devices which have high memory or storage .If you choose this option then your game graphic will became very.Here shadows will seen further more the enemy will killed in few bullets.

–Utra:

This is the best option for graphic  it is use for clarity  of game graphics after use of this graphic your game is run very smoothly and fast on your device.

3)FPS:  

The third option on the GFX tool is FPS option this option is used for unlock all maximum FPS limit on your phone or device. Here is different type of FPS limits such as:

30FPS

40FPS

60FPS

90FPS(IF SUPPORTED)

4)Anti aliasing :

 this setting is used for make the game textures smooth.

E.g 2×,4×