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Folio

Mirroring the tablet

Testing handwriting is easier when the tablet screen is on the Mac: you can record it, screenshot it and show it in a call. Use scrcpy.

Terminal window
brew install scrcpy
scrcpy -d

-d selects the physical device connected over USB. Without it, scrcpy stops with “more than one device or emulator” whenever an emulator is also running. Other useful selectors:

Flag Target
-d The only physical device (the tablet)
-e The only running emulator
-s <serial> A specific device from adb devices

The repo has a shortcut: just mirror runs scrcpy -d.

Tips

  • Pen input from the Mac mouse is not pressure sensitive. To test pressure, tilt and the eraser end, use the stylus on the tablet itself and only watch the mirror.
  • scrcpy -d --no-control mirrors without letting the Mac send input.
  • scrcpy -d --record folio-test.mp4 records the session.
  • Keep the tablet awake while mirroring: scrcpy -d --stay-awake.