The only option that I know that change the screen size is the "Small Display" on Features, it's small enough to play on touch without blocking the gameplay 
. Although it's fixed/default... its not resizable. 
. Although it's fixed/default... its not resizable.
Chill and Go with the flow ~d[o_o]b~
@YT - youtube.com/user/SuperHack333/videos
Specs:
MDL: Dell G7 15 7590 (Laptop)
OPS: Windows 10 Pro 64-bit
CPU: Intel Core i7-9750h @ 2.60 Ghz ~ 4.50 Ghz
GPU: Nvidia GTX 1660 Ti 6GB GDDR6 @ 1455 Mhz ~ 1590 Mhz
RAM: Micron Tech. 8GB DDR4 @ 2666 Mhz (4x2)
@YT - youtube.com/user/SuperHack333/videos
Specs:
MDL: Dell G7 15 7590 (Laptop)
OPS: Windows 10 Pro 64-bit
CPU: Intel Core i7-9750h @ 2.60 Ghz ~ 4.50 Ghz
GPU: Nvidia GTX 1660 Ti 6GB GDDR6 @ 1455 Mhz ~ 1590 Mhz
RAM: Micron Tech. 8GB DDR4 @ 2666 Mhz (4x2)