Informed Webmaster

Click on the button Full Editor & Preview. In the full editor you can add the image as an attachment by clicking on the Attachments tab below the post you're writing and click on Add files, chose the image file on your computer, click on the Open button and the image is added as an attachment. Click on the button Place inline next to the attached image, and the image will be added to the post content.

Here is an example of an attached image:

We actually prefer that images are attached to the post, so we don't risk a 3rd part server is down or have removed the image. But you are welcome to use the method you prefer