Hello

I have a problem with sketch lines visibility

I hav drawn the sketch, which is visible, then I activate it from the menu tree, but then the sketch name is not active the sketch is not visible any more. 

I have toggled the the sketch visibility visibility. It doesnt help. Also i somehow doesnt see visibility option in the center upper menu. 

I did constant supress and unsupress thing doesnt help either

What is the reason the sketch contours dissapearing? 

Best regards 

Jaanus