The pick line tool is available in everything that requires 2d draughting. It is very handy if you already have geometry provided by something else. Why is it that the tool only seems to pick up what it wants or allows and not everything that is currently visible? The proposal is to determine by viewport what can be picked.

The pick line tool came up with some very interesting picks (magenta) just not those I wanted which were the outer contours of the object and the top profile (grey). I provide the generic family in case you want to give it a go.