The default is sketch(im, style = 1, lineweight = 1, smooth = ceiling(lineweight), gain = .02, contrast = NULL, shadow = 0, max.size = 2048). - im: an image, obtained by using the im_load() function. - style: while style 1 focuses on edges, style 2 also retains shading. - lineweight: as the name suggests. set a numeric value equal to or larger than 0.3. - smooth: noise/blob smoother. set an intege