# Highlight the same symbol throughout notebook

Once I saw people using Matlab use a keystroke shortcut that made all the same symbols as a selected symbol become blue. I am wondering is there is a function in Mathematica that is similar. If so, what's the keyboard convenient shortcut. (Of course, Ctrl+F can be made to do something a little similar, but that is not what I'm looking for.)

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The IntelliJ plugin does this. – Szabolcs May 24 '14 at 2:15
@Szabolcs I guess the right question is to ask which text editor can perform this function. So, is IntelliJ plugin usually the text editor for MMA user? – Lawerance May 24 '14 at 17:42

There's a great Mathematica plugin for IntelliJ IDEA which also has sufficient understanding of Mathematica code to highlight multiple occurrences of the same symbol, taking into account localization. This is done automatically as you type. See how it underlines the symbol name: