Specify the width of a markdown image?

Yes, this syntax is supported by Blot's markdown converter.

You can also use % values in the parameter, like this:

![Caption](/path/to/_image.jpeg){width="80%"}

A relative width specification sounds like Pandoc..

Is there an option on a template side to pass the explicit width and height to all of the image elements? Then maybe we can use metadata to store the size data

Wouldn't that just be in CSS for the image tags?

Yeah, I already though that it could be an HTML or styles inject as well, that works!