Outlined shapes are filled and no shape border tool visible

Hi

This is the first time I have used prezi and I like it a lot. Most of it is beautifully designed and a superb user experience.

But not shapes!

I am trying to add an outlined triangle to my prezi.

However, when  I add the triangle using the icon which represents and outlined triangle with no fill,  it has a grey background and no visible border.

I can change the background, but no border is visible.  If I change border opacity in the CSS I can see a border, but I cannot change it's width!  And why should I have to edit CSS to do this anway?

Some of the support prezis mention a line colour tool in edit mode, but I have not seen it.

Frankly, I am amazed that something so basic as adding an outlined shape to a presentation is so hard in what is otherwise a fantastically well-designed feature set.

Please sort the shapes tool out.  The user experience is absolutely awful and lets down the rest of your excellent work.

Cheerio, Mike