How to Fix Image Bleeding - Control Image SizeEdit online
Sometimes the images may be too big for the page. The built-in CSS rules specify a maximum size for images, limiting to the width of the parent block. But if the parent block is itself too wide and bleeds out of page, you might consider specifying a length.
In your customization css, add the following snippet:
*[class ~= "topic/image"] { ... /* The US-letter page size minus page margins. See p-page-size.css for the current page size. */ max-width: 6.5in; }