11-27-2014, 10:40 AM
You don't. That's only for icons. In order to change a variable by a relative value in code, instead of doing something like v = 8, you'd do v += 8. You could also do v = v + 8, but that's just extra typing and only exists because older languages didn't support +=. The relative option in the icons is just asking if you wanna use += instead of =. It's a bit misleading, if you ask me, because I found myself asking the same question when I started coding.