Image
Add block » basics » image
Insert an image at this point on the page. There are options to upload an image or use an existing one.

When uploading an image there are also options to create a thumb nail for the image and to create an image link to the image.
Html to show an image
<img src="IMAGE_ADDRESS" alt="ALTERNATIVE TEXT" />
Images are uploaded to a folder named "images" in the main directory. The thumb nail is also created in the same folder