Hi Martin,

re:
> I've recently started to use the Polyline tool more and noticed that Perpendicular and
> Tangent snaps aren't available after the first click, even when using Construction lines.
> Is there a way these can be made available please?

Do you mean Perpendicular or Tangent from the previous polyline segment?

They are available by dragging out a construction line from the end of the previous line segment, looks like this:



- Michael