So I am trying to use the new to .47 feature that allows you to give a shape to the pen. I am using the triangle shape on the pen, but I cannot find out how to change the size of the triangle that is applied to the pen stroke. Does anyone know how to change the triangle's size?
Thank you.

Hi Snel,

When you draw with either the pen tool or the bezier tool and apply a shape to it, under the hood a Life Path Effect is added. If you open the Life Path Effect editor from the menu - Path > Life Path Effect editor (Shift+Ctrl+7) you can see what has happened. The effect "Pattern to a Path" is added to the Effect List. In this dialog you'll also see options to edit the pattern (on canvas) or to change parameters, amongst which the width.

Check out my Spiro Swirls tutorial if you want a quick run through of what happens under the hood.

Cheers,
Syllie

I think if you don't like the triangle that comes with Pen tool you'll have to create your own triangle and use it as custom preset.