Ubuntu 18.04 different scaling for bulit-in and external monitor

I have a 3840×2160 built-in monitor and one external monitor on the left side with 1280×1024 resolution. The built-in monitor is perfect for me with 200% scale. However, the external monitor has the same 200% scale which everything is magnified. Is there a way to have a different scale for these monitors? (100% for the external and 200% for the built-in one.)