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Xcode : shortcut for highlight feature


I recently started using Xcode for developing. It's pretty neat. By accident I happened to see one of its features. The feature only highlights the block of code I am currently working on. Other codes are covered with light grey. I do not know how to get that effect again. Can anybody help? Thanks!


Solution

  • You probably hovered your mouse over the line number bar like this:

    enter image description here