Downloading an image that's embedded in a Google Docs file isn't a straightforward process, but it's definitely possible. If someone's sent you a doc but forgot to attach the images separately, and ...
Right-Click and Save: Right-click on the image you want to save and select "Save Image As" from the context menu. This will open a file dialog where you can choose the location to save the image.
Resizing images in macOS is easily done in the Preview app, but if your daily workflow requires you to scale images to a specific size – for uploading to a blog, for example – then using an image ...