Prospect.io makes it easy to add images.
Image button (see below).
From there, you have three possibilities as far as the upload goes:
Drag and drop a picture directly from one of your folders
Click the upload button or the gray area and browse through your folders, the "old-school" way.
- Click the link button and paste an URL to your image. We recommend you use an image you have uploaded yourself to a server so as to avoid the image disappearing in case it's taken down by the original uploader.
You can then align the image, insert a link, change the size or delete it.