Xcode underlines all occurrences of a symbol that the cursor is on. However, the underline doesn\'t exactly \"pop out\" in the source code. Is it possible to make Xcode high
community!
I have the same trouble and found something like that. (where the "currencyId" i select,another its work of plugin)

Its, i guess, do the same thing like [Cmd+E, Cmd+F and Cmd+G combo] But its easier,you must only select word in your code.
How to install it to Your XCode:

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Profit
And also you can change color of highlighting!!!
go to Edit->Set Highlight color
Choose your color