WYSIWYG editor appears in the store's administrative panel when content is added. You can find it in product editing (descriptions), informational pages or blog. Thanks to the editor, you can, for example, add a photo, file or headers to your content.
SOTESHOP. WYSIWYG Editor - Entering Text and Description.
In the Admin Panel go to Applications → WYSIWYG Editor
Enabling advanced editing activates hidden editor options such as font type and size, and text and background color.