At this time, documentation for this is incomplete. Since Pro was released in Oct 2015, there have been so many filers, features and enhancements added with each update… so full documentation has not yet been completed. Likely after version 1.4 is released, documentation will be updated and completed. 🙂
I believe this is the template you would work with for the orders page shown: wp-content/plugins/wc-vendors-pro/templates/dashboard/order/order_details.php
so you would copy it to your child theme with this path: wp-content/themes/your-child-theme/wc-vendors/templates/dashboard/order/order_details.php to edit.
This is what I can provide at the moment for you as far as any actions and filters for the orders layout and functions.
I know this is a jumble, and if you cannot make sense of what goes where by comparing to the orders_details.php, I can work through it a bit with you. See if any of these at least give you a place to start:
actions:
public/class-wcvendors-pro-order-controller.php: do_action( 'wcv_orders_add_new_row', $new_row );
public/class-wcvendors-pro-order-controller.php: do_action( 'wcvendors_vendor_ship', $order_id, $vendor_id );
filters:
public/class-wcvendors-pro-order-controller.php: $this->start_date = ( !empty( $_SESSION[ 'PV_Session' ][ '_wcv_order_start_date_input' ] ) ) ? $_SESSION[ 'PV_Session' ][ '_wcv_order_start_date_input' ] : strtotime( apply_filters( 'wcv_order_start_date', $default_start ) );
public/class-wcvendors-pro-order-controller.php: $this->end_date = ( !empty( $_SESSION[ 'PV_Session' ][ '_wcv_order_end_date_input' ] ) ) ? $_SESSION[ 'PV_Session' ][ '_wcv_order_end_date_input' ] : strtotime( apply_filters( 'wcv_order_end_date', 'now' ) );
public/class-wcvendors-pro-order-controller.php: self::$billing_fields = apply_filters( 'wcv_order_billing_fields', array(
public/class-wcvendors-pro-order-controller.php: self::$shipping_fields = apply_filters( 'wcv_order_shipping_fields', array(
public/class-wcvendors-pro-order-controller.php: $columns = apply_filters( 'wcv_order_table_columns', array(
public/class-wcvendors-pro-order-controller.php: $row_actions = apply_filters( 'wcv_orders_row_actions_' . $order->get_order_number(), array(
public/class-wcvendors-pro-order-controller.php: return apply_filters( 'wcv_orders_table_rows', $rows );
public/class-wcvendors-pro-order-controller.php: $notice = apply_filters( 'wcv_orders_table_no_data_notice', __( 'No orders found.', 'wcvendors-pro' ) );
public/class-wcvendors-pro-order-controller.php: $order->add_order_note( apply_filters( 'wcvendors_pro_vendor_shipped_note', __( $store_name . ' has marked as shipped. ', 'wcvendors') ), $vendor_id ) ;
public/class-wcvendors-pro-order-controller.php: wc_get_template( 'shipping-label.php', apply_filters( 'wcvendors_pro_order_shipping_label', array(
public/class-wcvendors-pro-order-controller.php: $csv_headers = apply_filters( 'wcv_order_export_csv_headers', $csv_headers );
public/class-wcvendors-pro-order-controller.php: $csv_rows = apply_filters( 'wcv_order_export_csv_rows', $csv_output->format_orders_export( WCVendors_Pro_Vendor_Controller::get_orders2( get_current_user_id(), $date_range ) ) );
public/class-wcvendors-pro-order-controller.php: $csv_filename = apply_filters( 'wcv_order_export_csv_filename', 'orders' );
public/class-wcvendors-pro-order-controller.php: return $shipping_providers = apply_filters( 'wcv_shipping_providers_list', array(
public/partials/order/wcvendors-pro-order-table-actions.php: WCVendors_Pro_Form_Helper::input( apply_filters( 'wcv_order_start_date_input', array(
public/partials/order/wcvendors-pro-order-table-actions.php: WCVendors_Pro_Form_Helper::input( apply_filters( 'wcv_order_end_date_input', array(
public/partials/order/wcvendors-pro-order-table-actions.php: WCVendors_Pro_Form_helper::submit( apply_filters( 'wcv_order_update_button', array(
templates/dashboard/order/order_details.php: if ( in_array( $meta['meta_key'], apply_filters( 'woocommerce_hidden_order_itemmeta', array(
templates/dashboard/order/order_details.php: $meta['meta_key'] = apply_filters( 'woocommerce_attribute_label', wc_attribute_label( $meta['meta_key'], $_product ), $meta['meta_key'] );
Please let me know if I can help further.