Upload an image to use as a background
As a background image, You can use an image that you have created using an image manipulation program or from a Visio chart. To do this, click the “Browse” button, select your image, and click the “Upload” button. Images can be in PNG, JPEG, or GIF format.
Delete a background image
To delete a background image, select it from the pull down menu and click the “Delete” button. The image will automatically be removed from all the previously created views in which it is used.