When I currently scale objects they always scale from the top left. Is there a way to set a different scaling starting point, like for example in Illustrator?
When you select the
scale option on the top toolbar, you can select a scale reference point. Here's an example where the center is selected.
You can also scale with shortcuts like this :
(Quoting the official Sketch documentation)
So, to scale a layer so that it’s 50 pixels wide, from the right, you’d set its width to 50r.