To move button go to wp-content/plugins/printful-shipping-for-woocommerce/includes,
open file “class-printful-template.php”
And change this: woocommerce_after_add_to_cart_button (it is a place for button) in the line below
add_action( ‘woocommerce_after_add_to_cart_button’, array( $this, ‘printful_template_customize_button’ ), 20 );
For example, if you whant to move “personalize button” befor “add to cart button” change “woocommerce_after_add_to_cart_button” on “woocommerce_before_add_to_cart_button”.
To change “personalize button” style go to wp-content/plugins/printful-shipping-for-woocommerce/includes/templates and open file personalize-button.php
