This is exactly the same as my last guide for the first, but I feel it should be known just in case somebody starts from 2.

• Right click anywhere on your desktop, then click on display settings

• Under scale and layout, change the scaling to 100%

When you restart the game it should be at the native resolution of your monitor.
This guide is mainly for people with 2k/4k monitors but still, it should be an option in the game's internal settings.

Have fun.