command key

Command Click for Features

Hold Command while Left-clicking a function, to access features associated with the clicked function.

For example "Jump to Definition" will jump to the function selected.
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You can also Command+Left-click variables to to access useful features, like "Edit All in Scope" will allow you to rename the variable across the code.
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"Callers" list where the function is being called from. If only one caller is used, the cursor will jump to that caller.
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