Mark Occurrences preferences
Use the 
Mark Occurrences preference panel to set annotations for the C/C++ Editor view.
| Option | Description | Default |
|---|---|---|
| Mark occurrences of the selected element in the current file | If enabled, then you'll see within a file, where a variable, function, method, type, macro or other element is referenced. | On |
| Keep marks when the selection changes | If enabled, don't change the location of the mark occurrence when a new selection is made. | On |
