When I am composing an email and utilize the "Insert" -> "Screenshot" function in Outlook 2019 (Windows 10) to capture a portion of the screen, then copy and paste that into Paint.net in order to edit the image (such as circle something, adding a big arrow to point at something, etc.)... the image always pastes into Paint.net overly large and blurry. I always then have to manually resize the image to about 64% the original size to make it match the original screenshot.
If I look at the image properties ("Format Picture...") in Outlook, it would say the image is (for example) 8"