If you're working in a WYSIWYG editor, you can add an image by uploading your image to Cascade, then browsing for it in the WYSIWYG.
1. Upload your image:
Click the Add Content button and use any file type option available to you.
These options are set up by your CMS administrator so they might be named something like "File", "Image" etc.
If you don't see any file options available to you in the Add Content menu, you'll want to contact your CMS administrator or web team for further assistance.
2. Add your image in the WYSIWYG:
Click the Insert/Edit image button, browse for the file you just created, and add alternative text for your image.