- Go to Plugins > Editor
- Select
Jetpack by Wordpress.com
at the top-right - Select
jetpack/modules/contact-form.php
from the list of files on the right (changes the directory) - Select
jetpack/modules/contact-form/grunion-contact-form.php
from the list of files on the right - Search
case 'date'
- Below that case and before
default
, add the following case, replacing***API-KEY-GOES-HERE***
with your filepicker.io API key, and adding any other filepicker.io rules (mime types, file size, etc.) as attributes