On Windows 10, how to fix the Android emulator when it does not fit its window -

i have issue whereby android emulator not fit window shown in image below. strangely, interact emulator believes screen fit open gmail in image, must click near bottom of screen in black. also, screenshot comes out correctly no black.

what have tried remedy issue:

• i have tried range of android apis (o, nougat, lollipop, etc.)
• i have tried downgrading android studio
• i have tried reinstalling android studio deleting .android etc. fresh install
• i have tried installing recommended updates (haxm, etc.)
• i have tried range of phone/tablet screen sizes
• i have tried range of settings including different graphics options configurable under avd manager
  • this includes setting graphics software
• i have tried resizing window
• i have tried zooming in/out

can help? seems such basic thing.

avd details:

name: nexus_10 cpu/abi: google apis intel atom (x86) path: c:\users\x\.android\avd\nexus_10_api_22.avd target: google_apis [google apis] (api level 25) skin: 2560x1600 sd card: c:\users\x\.android\avd\nexus_10_api_22.avd\sdcard.img hw.dpad: no runtime.network.speed: full hw.accelerometer: yes hw.device.name: nexus 10 vm.heapsize: 192 skin.dynamic: yes hw.device.manufacturer: google hw.gps: yes hw.initialorientation: landscape skin.path.backup: _no_skin image.androidversion.api: 25 hw.audioinput: yes image.sysdir.1: system-images\android-25\google_apis\x86\ tag.id: google_apis showdeviceframe: no hw.camera.back: emulated hw.mainkeys: no avdid: nexus_10 hw.camera.front: emulated hw.lcd.density: 320 avd.ini.displayname: nexus 10 hw.gpu.mode: guest hw.device.hash2: md5:47dc70fd92541dd16c19f9efa3e9db62 hw.ramsize: 1536 hw.trackball: no playstore.enabled: false hw.battery: yes hw.cpu.ncore: 2 hw.sdcard: yes tag.display: google apis runtime.network.latency: none hw.keyboard: yes hw.sensors.proximity: no disk.datapartition.size: 800m hw.sensors.orientation: yes avd.ini.encoding: utf-8 hw.gpu.enabled: yes