Need help to find an option

Turn off instant 2D on the toolbar.

Hello,

You can turn off Instant3D to disable this, but it turns off all of the Instant3D functionality, not just your dim box.

I searched through Options and didn't find anything just for your post, so it's just the Instant3D toggle.

Cheers,

Kevin

Vincent,

I believe Greg is referring to the new Instant 2d feature in sketches.  However, your screenshot looks like you aren't in an active sketch, so I believe Kevin is right.  I personally like Instant 3d and Instant 2d, but they're both easy to turn off.