Max: UVW Edit menu "Showed shared subs" disappear randomly

Perfectblue

Normally in the Edit UVW menu, when you select an edge, it will highlight another edge thats connected to it in blue. So you can easily stitch pieces together. For some reason this has disappeared on mine. I have shared subs enabled which is what results in the blue shared edges to begin with. Might this be a bug? Max 2011.

Mark Dygert

That happens to me too from time to time, its normally triggered by an action like planar map or automatic unwrap. I can normally get it back by doing some other operations like closing and opening the UVW editor window or collapsing the stack and applying UnwrapUVW again.