One way to resize is to go to avd manager then click on pen icon to edit. Now change the scale settings based on screen resolution. Android studio use to have emulator configuration options in which I could pass arguments such as “-scale 0.8” to scale the emulator. But as of this writing Android studio no longer has that option. Another option is to connect via telnet and pass commands to it. Also more options are available read this.
First go to programs and features then select Telnet Client and Server then apply. Now open command prompt and type “telnet localhost 5554” if it is the first instance of the emulator. Increment by two for the next one and so on if multiple instances are running.
Type telent commands carefully. After making typo in command then fixing by backspace and insert doesn’t work. Just press enter and reenter the commands.
For using terminal and command prompt to run and scale the emulator the easiest thing to do is first do a run using the play button. No need to wait for the emulator to load. Just note the emulator path with its arguments in the run tab bottom of the screen.
Copy the whole command and go to terminal tab on android studio. Now paste it in terminal and change the scale factor.
Using Command Prompt:
Just open command prompt and paste in the same command copied as above. Then just change the scale part to best suit your screen resolution.
Read using the Emulator Console Part.