There used to be line markers on the right-hand side of the window (next to the scroll bar) which marked occurrences of variables or other things (such as TODO's or compiler errors). They looked liked color-coded dashes. I could click on a marker and it would jump to that occurrence of the variable in my code. Or, I could click anywhere in the bar and it would jump to its relative vertical location in the file.
I'm not sure what I did, but the markers disappeared and I can't find a setting to bring them back. Does anybody know how I can re-enable them?
Also, "Mark Occurrences" is enabled in my editor, and variable occurrences are properly highlighted in my code as normal when I have a variable selected.