My subsurf is diabled

Hello,

My subsurf modifier is disabled somehow. You can tell it is from the red on the image attached. When I return to factory settings it fixes it, but I was wondering if anyone knows how it got disabled in the first place.


Please ALWAYS supply an example .blend file with any support question.
Make sure you don’t have “Simplify” checked in the scene tab with low Subsurf settings.

That was it, thank you.