I've played around with changing the values and it seems to work just editing the values and the resulting image will scale to it up to the size of the original. So that can be used to specify whatever dimensions you want for more control over that.
I've played around with changing the values and it seems to work just editing the values and the resulting image will scale to it up to the size of the original. So that can be used to specify whatever dimensions you want for more control over that.