Consider the scenario that I have a document containing a large image (300mm x 300mm) and I want to have the document as A4 page size (210mm x 297mm) DOCX and HTML. For the DOCX, I want to manually choose a good size for the image (160mm x 160mm) based on the image caption and other things. And for the HTML, I want to use 100% width. What is the best strategy?