The WYSIWYG editor gives you the ability to enter and format your content while working in a “What You See Is What You Get” view of the content. The editor can be used to create content for pages, blocks, and product descriptions. When working in the product catalog, the editor is accessed by clicking the WYSIWYG Editor button.

WYSIWYG should only be used to edit text, never use it to edit HTML. Always turn off WYSIWYG editor when you want to edit HTML on Magento's CMS fields in the page/block content. Otherwise the WYSIWYG editor can break your content.

After installing Intenso the editor will be hidden by default, but it can always be turned on with the Show/Hide Editor button above the page/block content field.

Show/Hide WYSIWYG editor