'redo' button is always grayed out

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Paragon
Paragon 2017-4-30
评论： Image Analyst 2020-6-10
Hello, I know it is a silly question, but I just don't know where to enable it in the options. Its right next to undo, I know where it is, but it is always grayed out. Do I have to change something? I have R2015a and undo works just fine. Shortcuts also dont work for redo.
Thank you.

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采纳的回答

Image Analyst
Image Analyst 2017-4-30
It will be grayed out until
  1. you have a file open in the editor, AND
  2. you have made a change to it since you opened it, AND
  3. the focus (your cursor) are in the edit window.
  2 个评论
Paragon
Paragon 2017-4-30
Thank you for this unbelievably fast answer;
I satisfy all the conditions, still; it is grayed out.
Image Analyst
Image Analyst 2017-4-30
That's all you need. I just tried it. Now you need to call the tech support line at the Mathworks.

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更多回答（1 个）

Jing Ci Neo
Jing Ci Neo 2020-6-10
编辑：Jing Ci Neo 2020-6-10
The redo button is on the top right hand corner in the light blue bar to the left of "Search Documentation" (See attached). The redo arrow that is greyed out is in the Editor bar, mine is greyed out too.
  1 个评论
Image Analyst
Image Analyst 2020-6-10
It will be grayed out unless you are in an editor window (not some other panel, the editor window is the one that needs focus), AND you have made some change to the code since the editor window was opened.

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