【Q】 How to use the shortcode [rlallpostcontactform] in (2) on the Settings-Window for "All Post Contact Form" on the WordPress Admin-Window, in my original template (in wp-content/themes/my theme/)'s PHP file. What should I do?

How to use the shortcode [rlallpostcontactform] in (2) on the Settings-Window for "All Post Contact Form" on the WordPress Admin-Window, in my original template (in wp-content/themes/my theme/)'s PHP file. What should I do?