Uploading an image
To upload a new image, select the ‘Add new media’ sub-menu option. From here you will be presented with a form that allows you to select the image from your computer and enter the alternate text for the media file (that which describes the file) and enter a title for the file – all are required. The title is used in the listing of your images and for the title attribute when the image is placed in to the HTML.
When you click on the ‘upload’ button, a progress bar will display showing you how much of the image has been uploaded. Once the upload it complete you will automatically be taken to the list of images previously uploaded. Behind the scenes, the system has generated varying sizes of your image that you can select when editing a page.