Custom Resolution Utility (CRU)

[Xletalis]

Hello can someone help me witn CRU, I'm trying to set the resolution on my FHD laptop to 4k but it keeps showing only a quarter of the screen everytime i set it to 4K, i thought putting the scaling at lower than what it is would fix that but the only thing changing was the placement of files on desktop and not the screen. Please i need your help in this.