Thanks Trevor, I know how to set units. What I'm asking is: let's say I draw a rectangle, I can stroke it with 0.35 pt (or any other fraction of a point). But when using the Line Tool, it's minimum weight is 1 pt (px, whatever), it's that number on the right hand side of your screenshot. I think this is because the 'Line Tool' is not actually drawing a 'line' at all, rather it's just a very thin rectangle ? I ask because I would love to be able to have thinner arrows
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