Posting with images is way harder than it should be. Basically you need to 1) upload to a image cloud storage site such as imgsafe.org and then 2) paste a URL for each image from that site in you Steemit post. I've had so so results doing this. One post I did had about six images but Steemit only displayed the first three. I had to put the other three into the comments.

Many posts have lots of images and formatting, so maybe someone can chime in with a better way?