Object overlapping in html

I suggest to implement the following feature:
The feature already exists (e.g.: pdf ) but needs to be available in HTML format as well.

**A typical use case might be: **
Sending an e-mail to the client with a report that has an image beneath the text (watermark).
Currently the behavior is to show only the top/above object only in html format.

P.S. - the origin for this idea is: Html preview for e-mail not rendering properly