Scanned sketches are raster images and raster images have some limitations related to image resizing; to overcome that you need to use high-resolution raster which increases the file size. The only solution is converting a raster image to vector graphics or completely redraw it. After adding the vectorization feature to Synfig, scanned drawings and raster images can be easily converted into Vector Images which are resolution independent. Moreover, the obtained vector graphic can be further edited in Synfig. This proposal is about developing an option for Synfig to perform vectorization of bitmap/raster images using an algorithm(s) of vectorization from OpenToonz.