[[File:TinyMCE_InsertImage.png]]
Each image requires a source, a source is the location the image resides. i.e. http://geekmom.com/wp-content/uploads/2014/09/Microsoft-Logo1.gif
An image description is not required but can be useful as sometimes images get moved on the web so they name will take its place should it be removed.
The dimension will be read in from the image but can be changed if needed. They can be constrained so that the image doesn't get stretched but this can be unticked if needed.