Reduce uploaded images's size with Optipng and Jhead. There is no option for this plugin.

Automatically optimize uploaded images using the Spatie image-optimizer library and binary files on your host system (e. g. jpegoptim, optipng)

A WordPress plugin that uses jpegoptim and optipng to compress images during upload, allowing you to override the compression level and quality on a per-image basis. It will compress the thumbnails that WordPress generates but will leave the original file intact, so that you can safely restore your changes if necessary. In order to use Slimage, you need to have jpegoptim and optipng installed on your server.