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docs: document device scaling issue #19387

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merged 1 commit into from Aug 8, 2019
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docs: document device scaling issue #19387

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9 changes: 9 additions & 0 deletions docs/development/testing.md
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Expand Up @@ -48,3 +48,12 @@ would run `npm run test -- -g ipc`.
1. Push the Windows key and search for _Manage optional features_.
1. Click _Add a feature_.
1. Select _Japanese Supplemental Fonts_ and click _Install_.


Some tests which rely on precise pixel measurements may not work correctly on
devices with Hi-DPI screen settings due to floating point precision errors.
To run these tests correctly, make sure the device is set to 100% scaling.

To configure display scaling:
1. Push the Windows key and search for _Display settings_.
1. Under _Scale and layout_, make sure that the device is set to 100%.