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I use "revtex4-1" document class in TeXstudio. But I find that the environment "widetext" is labeled "command not recognized" even after I check the box before the term "revtex4-1.cwl" in the "Completion" for configuration.

The question is: how can I make TeXstudio recognize "widetext"?

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from FAQ: Why does TeXstudio mark a command as unrecognized:

TXS checks all LaTeX commands in the document for validity. This helps you recognizing errors (typos and not loaded packages) already while typing. If a command is marked as unrecognized, TXS did not find a definition for it. See How does TXS know about valid commands? for more details.

For information how to solve the issue, follow the links above.

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