Topic: vscode: how to include navigation on the code?

Greetings. I try VS Code. But it is not clear how to include navigation on With ++ to the code. Simply Go To Declaration does not work, even if in a current file. Who prompts actions, what it to include, in  VSCode? (Since already any plug-ins and adjustments have been produced, for definiteness I will clear a profile). I cannot achieve it, though installed different extensions and tried to create configs in the different places mentioned in any articles.