You can add images using the image uploader or Markdown.
The easiest way to add an image to your instructions is to use the image uploader. Simply click this image on the toolbar when editing a Markdown step block:
You can then upload your image and optionally crop and rotate it. The Markdown to render the image will be inserted into your Markdown editor automatically.
You can add an image using markdown like the following:

Here's what that would look like:
You can add an image caption by wrapping it in quotes after the URL of an image, like this:

Here is what that caption would look like under an image:
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