With Frontend Submissions installed and activated, a vendor contact form can be shown on the single vendor page. The following code snippet demonstrates how to change the title of the contact form.

 * Frontend Submissions: Change the vendor contact form title.
 * Default: "Contact vendor"
 * @return string The title of the vendor contact form.
function themedd_snippet_edd_fes_contact_form_title() {
	return 'Contact';
add_filter( 'themedd_edd_fes_contact_form_title', 'themedd_snippet_edd_fes_contact_form_title' );

PHP should be added to your child theme's functions.php file.