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How to close the small blue window appeared in the command window

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Chaoyang Jiang
Chaoyang Jiang 2018-5-11
回答： Walter Roberson 2018-5-11
Does anyone experience this, where a small blue window appears in the command window and cannot be closed?
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回答（2 个）

Ameer Hamza
Ameer Hamza 2018-5-11
Turn off the function hints from MATLAB Preferences. Run
preferences
Navigate to MATLAB > Keyboard, uncheck Enable function hints. If you want them to appear manually, press Ctrl + F1.
Walter Roberson
Walter Roberson 2018-5-11
Historically this problem has been connected to using Unity on Linux.
https://www.mathworks.com/matlabcentral/answers/178241-why-are-all-the-warning-boxes-blank
https://www.mathworks.com/support/bugreports/1229653
The information there is about empty pop-ups, but the problem with pop-ups not being closable was related if I recall properly.
There have also sometime been really messy displays on Linux due to Java issues; https://www.mathworks.com/matlabcentral/answers/296491-problems-with-matlab-windows-both-editor-and-command-line-windows-when-using-r2016a-on-ubuntu-16-0

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