Solution: Android Emulator is too big and wont fit on screen -Windows 10
Source: https://www.youtube.com/watch?v=oZdXk0-7_W8&ab_channel=TheDebugArena
In file explorer, find:
C:\Users<user>\AppData\Local\Android\Sdk\emulator\qemu
Find the emulator you are using.
For me, it was: windows-x86_64
Open the folder and locate: qemu-system-x86-64
Right click it and go to Properties,
Go to the Compatibility Tab and click "change high DPI settings".
Check the box "Override high DPI scaling behavior. Scaling performed by:" and select "System" in the dropdown below.
Click Ok and then click Apply.
Restart your emulator and it should be correctly sized.