When working with images in blog, one might need to adjust image size to fit different layouts and screen sizes. Here’s the hack:

(delete the space at after double {{)

{{ <figure align="center" src="/path/pic_name.jpeg" caption="caption_text" width="50%">}}

Or, by pixel size:

{{ <figure align="center" src="/path/pic_name.jpeg" caption="caption_text" width="300px">}}