How Long Will a Curve Line Remain Editable

Another thing to note is that, the curve line remains editable

until you use another brush/action to modify your model.

Then go back to click on the Curve line,

Curve strap snap will generate another new strap on top of the existing strap.

The previous belt is merged as part of the torso Subtool with a different Polygroup colour.

So overall, there is only 1 Subtool but 3 different Polygroup colours.

Let me Ctrl Z to undo all these.