Controlling stroke width of a shape

Hi
If I make a square shape and set fill to none, I don’t seem to be able to set its stroke width, am I missing something or is this a design decision to keep things simple?
In Miro its possible to tweak this, depending on the scale of the board and what Im trying to achieve, it can often be a bit limited in Figjam compared to Miro

thanks
Tom

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