I have made and watched Ben Ormstad tutorial (good): UE4 Tutorial | Main Menu + Options to Adjust Resolution - YouTube .Target is to made settings menu where only can adjust game resolution. And have made like in video. Screenshot about my blueprint like in video:
.But nothing happens when pressed resolution button. What is wrong or is something missing
Change to 1920x1080, the command will not be recognized since you put the x and y numbers between asterisc *
Tip: you can add the âfâ suffix in the end to fit to coordinate 0,0 inside the user screen. ex: r.setRes 1920x1080f
Nice, thanks lot of 
If you want to store the settings I found a great tutorial.
It covers all the graphic settings including resolution. Works as intended in cooked project too as everything is stored in .ini File