Nikon d7000 does it have safezone feature?

I want to shoot "anamorphic" effect but the camera doesn't have that resolution, so what I have left to do is to crop the footage. But is there any "safezone"/"safearea" feature in that camera? So I would know what is going to be in frame easly

No, it doesn't have anything like that. DSLR cameras are not good for professional video. You really should be using a proper video camera if you want to do this sort of effect.

This is the kind of thing you have to do in post production. In your editing software change the crop, adjust the aspect ratio and export your footage as you want it.

If you want to know what the safe zone is, then you'll have to experiment a bit and draw lines on your rear LCD screen. That's the only option. I recommend putting a screen protector over it before you draw on it, that way you don't ruin the camera and you can still sell it on in the future no problem.