Please help. I cannot find any settings for the few things.

1) I have my model’s visible sketch either visible or not at the drawing.

Once the sketch is visible at the drawing I cannot turn it visibility off

even if I would make this sketch hidden at the model.

2) The tangent edge lines have the same thickness as main lines.

I wish I would have them much thinner.

Is there any setting for that?

3) If I would align some views at the drawing I cannot make them

free again. At least I did not find this option if it exist.