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there are several filters available in the printed output of your order history. essentially, there are 3 sections

a) css / layout (colors, fonts, borders etc)
b) display of various parts (default being that all are printed , but can be removed as required with filters)
c) sections like header, order summary , order details/items etc , that can be globally rearranged/removed

(a – css / layout) examples

to add your own or change existing css:
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_css','myprefix_add_css');
function myprefix_add_css($style){
// *** to change overall font/fontsize (default being font-size:12px;font-family:Arial, Verdana, Helvetica, sans-serif)***  //
$style['global_font']='html,body,table,tbody,tr,td,th,span{font-size:10px;font-family: Verdana, Helvetica, sans-serif}';
// *** to change item font size (default being 100%)***  //
$style['items_fontsize']='#items .item td{font-size:120%}';	
// *** to remove exiting ['table'] style for instance ***  //
unset($style['table']);
// *** to change exiting  ['table'] style for instance ***  //
$style['table']='table{// use your own css declaration //}';
// *** to add new/your own css declaration***  //
$style['custom']='// add some custom css declaration //';
/*so, to make any additional info bigger (added ingredients if used for example) */	
$style['custom']='.itemaddinfo>td{font-size:120%}';
// *** to remove ALL css *** //
$style=array();
return $style;
}

(b – parts) examples

(b) header

to add, amend or delete header elements (examples) :
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_header_output','myprefix_amend_header_elements');
function myprefix_amend_header_elements($elements){
// to add something to footer
$elements['tableFooter']='<tfoot><tr><td colspan="2">something</td></tr></tfoot>';
// to remove address for example
unset($elements['address']);
return $elements;
}

(b) overview

to add, amend or delete different elements (examples) :
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_overview_output','myprefix_amend_overview_elements');
function myprefix_amend_overview_elements($elements){
// to remove payment_type line
unset($elements['payment_type']);
// to remove payment_method line
unset($elements['payment_method']);
// to remove transaction id line
unset($elements['transaction_id']);
// to add something after transaction_id
$elements['transaction_id'].='<tr><td>something left</td><td>something right</td></tr>';
// to move transaction_id before payment_type (.ie after delivery)
$tid=$elements['transaction_id'];//store var
unset($elements['transaction_id']);//remove original
$elements['pickup_delivery'].=$tid;//append after delivery
// to add something to footer
$elements['tableFooter']='<tfoot><tr><td colspan="2">something</td></tr></tfoot>';
// to remove table header for example
unset($elements['tableHeader']);
return $elements;
}

(b) customer details

to add, amend or delete different customer data (examples) :
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_customer','myprefix_amend_customer_details');
function myprefix_amend_customer_details($details){
//	do a print_r($details); to get all keys - they will be something like [cname],[cemail],[caddress],[ctel] etc
// so to remove the line containing the email address (key being [cemail]) do:
unset($details['cemail']);
return $details;
}

to add, amend or delete different elements (examples) :
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_customer_output','myprefix_amend_customer_elements');
function myprefix_amend_customer_elements($elements){
// to add something to footer
$elements['tableFooter']='<tfoot><tr><td colspan="2">something</td></tr></tfoot>';
// to add something after items
$elements['tableBodyItems'].='<tr><td>something </td><td>something </td><td>something </td></tr>';
// to remove table header for example
unset($elements['tableHeader']);
return $elements;
}

remove or alter customer details labels for example:

add_filter('wppizza_filter_print_order_customer_detail','myprefix_amend_customer_data',10,3);
function myprefix_amend_customer_data($detail,$key,$item){
//* to remove all labels in front of all customer details**
$detail='<tr><td colspan="2" >'.$item['value'].'</td></tr>';
//* to remove only the label for email in front of all customer details**
if($key=='cemail'){
$detail='<tr><td colspan="2" >'.$item['value'].'</td></tr>';
}
//* to alter the label in front of emails details**
if($key=='cemail'){
$detail='<tr><td>- my new label--</td><td>'.$item['value'].'</td></tr>';
}
return $detail;
}

(b) order details

to delete the single item price for example in each element:
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_single_item','myprefix_amend_item');
function myprefix_amend_item($item){
// to remove pricesingle after item name/size
unset($item['pricesingle']);
//to remove category name
//(only applicable if enabled in wppizza->layout Group, sort and display menu items by category)
unset($item['category']);
return $item;
}

to add, amend or delete different elements (examples) :
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_items_output','myprefix_amend_items_elements');
function myprefix_amend_items_elements($elements){
// to add something to footer
$elements['tableFooter']='<tfoot><tr><td colspan="2">something</td></tr></tfoot>';
// to add something after items
$elements['tableBodyItems'].='<tr><td>something </td><td>something </td><td>something </td></tr>';
// to remove table header for example
unset($elements['tableHeader']);
return $elements;
}

(b) order summary

to add, amend or delete different elements (examples) :
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_summary_output','myprefix_amend_summary_element');
function myprefix_amend_summary_element($elements){
// to add something to footer
$elements['tableFooter']='<tfoot><tr><td colspan="2">something</td></tr></tfoot>';
// to add something after summary
$elements['tableBodySummary'].='<tr><td>something left</td><td>something right</td></tr>';
// to remove table header for example
unset($elements['tableHeader']);
return $elements;
}

(c – sections) examples
to reorder the different parts (or omit one or more entirely ):
in your theme’s functions.php:

add_filter('wppizza_filter_print_order_output','myprefix_amend_output');
function myprefix_amend_output($parts){
// to reorder just arrange the order as required below. for example, to have customer details last
$newparts['header']=$parts['header'];
$newparts['overview']=$parts['overview'];
$newparts['items']=$parts['items'];
$newparts['summary']=$parts['summary'];
$newparts['customer']=$parts['customer'];
return $newparts;
//to - for example - omit the header entirely
unset($parts['header']);
return $parts;