Custom template shorcodes

Is there a way to create my own customs shortcodes?

I'm using ACF, and it allows me to create a global configuration page.
acf_add_options_page(array(
'page_title' => '......',
'menu_title' => '.....',
'menu_slug' => '.....',
'capability' => 'edit_posts'
));

There I can attach custom fields. Then later I can access this info from anywhere using
return get_field( $field_name, 'options' );

Is there any way to access these fields from the templates and of course while rendering?
Thank you in advance.

Works like a charm, Thank you so much.

Amazing support and documentation never enjoyed working with a plugin like E2PdF. It is a pleasure doing business with you guys.
I'm giving my review and getting the pro-version to support further development, despite I only need the features of the free version (one template, one page).