I know that ACF has the ability to display content from a shortcode on a theme but is there a way to add a shortcode in the_content? I want a way to have a shortcode for a custom field to be inserted in the writer so that users can insert the custom field anywhere in the post on the writer panel.
I believe you can add a shortcode in your content using something like this: [acf field="field_name" post_id="123"]. This page should give you more idea about it: http://www.advancedcustomfields.com/resources/shortcode/.
I hope this helps.