Uploading an image to Cascade CMS is done through the Common Asset Factory, using the red plus sign for adding content. This method ensures that the appropriate metadata is included with the image, making it search-engine friendly, and 508 compliant for persons with disabilities.
Select a folder by hovering over the asset name and clicking on the arrow that appears to the right of the asset name. The contents of that folder will display on the right hand side of the page.