user13783: How can I do this sentence show me in arduino."WARNING: Category 'USB' in library Mouse/keyboard is not valid.Setting to 'Uncategorized'

user3917: Your question is unclear.
Note that Mouse and Keyboard libraries are suitable for use with Arduino Due and Zero boards, or with 32u4-based boards like Arduino Leonardo or Micro.   They are not relevant when using an Uno.

13783: <p>How can I do this sentence show me in arduino."WARNING: Category 'USB' in library Mouse/keyboard is not valid.Setting to 'Uncategorized'</p>
 3917: <p>Your question is unclear.</p>

<p>Note that <a href="https://www.arduino.cc/en/Reference/MouseKeyboard" rel="nofollow">Mouse and Keyboard libraries</a> are suitable for use with Arduino Due and Zero boards, or with 32u4-based boards like Arduino Leonardo or Micro.   They are not relevant when using an Uno.</p>
