In order to handle the complex cases, it needs HTML and CSS coding skills. Please ignore the followings if you don't code.
Apart from the standard image upload method, sometime you may want to grab the image's URL and paste it to somewhere else. For this case,
1. Upload the image to any place in your article;
2. Place the cursor upon the image and right click the mouse, choose "image properties"
3. copy the URL.
You can also get the url by checking the image’s detail information from the "Media Library"