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.
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 ...
If you want to neatly share PDF pages on social media without relying on ugly screenshots, you should convert them to JPEG images, a.k.a. JPG. That's just one of multiple reasons why you'd want to ...