|Type:||"block", "inline", "none"|
|Used By:||All block elements|
|Default:||"block", except for SPAN, A, B, STRONG, EM, I, U, O, TT, ZAPF, SYMBOL, STRIKE, NOBR, BIG, SMALL, CODE, SUP or SUB, which are always "inline"|
In the current implementation, the only time you'd ever want to use this attribute would be inside a paragraph - when an element which is usually a "block" element is set to inline to cause it to appear inside the paragraph (which may be explicit or anonymous - see the userguide for more information).
The other option is that the value can be set to "none", which has the effect of causing the element and it's children to be ignored completely.
This causes the image to appear in the middle of the paragraph of text
<p> This text is broken in <img display="inline" src="file:/path/to/image.jpg"/> two by an image </p>
The second paragraph and it's children will not be added to the document
<p>First Paragraph</p> <p display="none">Second Paragraph, which will <b>not</b> be shown</p> <p>Third Paragraph</p>