Just an idea I've seen this somewhere and would use a lot in marked:

In the generated HTML,

• If the markdown code for image []() is just BEFORE a text (no line break), the image tag is generated with "align='left'" ()
• If the markdown code for image []() is just AFTER a text (no line break), the image tag is generated with "align='right'" ()
• If there is a line break in the code, nothing is indicated (but an option to add centering would be nice)

I hope it is understandable, I'm sorry I can't remember where I have seen this functionality. I do not know if it is easy to implement, but its use is very intuitive and it extends the possibilities (for the moment I'm modifying the generated code to add these).

Another suggestion: the option to add target="_blank" in HTML generated links.

Thanks !