I wonder if I could use the Flattener so that PDFs are smaller and have less elements, but all images are kept how the are (compression, resolution etc.). The Optimizer provides appropriate options, but I haven’t seen similar options for the Flattener.
It might be best if you explained what your overall objective is? There are many things you can do to a PDF using PDFNet, Flattener and Optimizer are just simplified interfaces to some common operations.