php - netbeans: the replace button is unclickable? -

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I want to find and replace a string in netbeans.

But the Edit -> Change Button is Unclickable

Why is this and how do I solve it?

The Change menu item is only enabled when the input focus area is in the field.

When an open files or input focus is not on the side tab (project, files, etc.), the menu item is not available.


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