How can I do to adjust an image?
This is not working for me.

How can I do to adjust an image?
This is not working for me.

Insert image using directly HTML
Discourse (using CommonMark) follows this convention:

But this does not work yet on WriteFreely, so the HTML tag is a better option.
Thanks for bringing this up @how. This is yet another good reason for us to find a way to implement extended Markdown like CommonMark into Write.as/WriteFreely.