Reply To: ACF File – Preview of document

• John Huebner

• July 6, 2016 at 8:14 am

There isn’t any way to change the icon shown by ACF.

There are 2 hooks that might be used to alter what is displayed.

The first is acf/prepare_field https://www.advancedcustomfields.com/resources/acfprepare_field/. There isn’t much documentation on this one, but I don’t think it will let you do what you want to do. You’d need to figure that out.

The other hook is acf/render_field https://www.advancedcustomfields.com/resources/acf-render_field/. This hook also will not do what you want but it would let you add html to the field to show additional information, like a thumbnail of an image. I can’t say if you can show a PDF or other file type. You can see an example of using acf/render_field used to show and image for a URL field here https://github.com/Hube2/acf-filters-and-functions/blob/master/render-image-in-editor.php