How do I print the UPC as a scannable Barcode in Lightspeed?

In Lightspeed click on the SETTINGS tab on the far left. In the very last row click on the Print Templates icon.

In that view you can see various sections with 'code'. Find the section that looks like this tab:

Copy and paste the code below into the ItemLabel tab.

{#
***Begin Custom Options***
Set any of the options in this section from 'false' to 'true' in order to enable them in the template
#}

{% set vendor_number = false %} {# Display Vendor ID (if available) above Description #}
{% set show_custom_sku = false %} {# Display Custom SKU (if available) above Description #}
{% set show_manufacturer_sku = false %} {# Display Manufacturer SKU (if available) above Description #}
{% set show_upc_code = false %} {# Display the UPC code at the top of the receipt (using UPC codes in barcode does not work) #}
{% set show_date = false %} {# Display today's date above description (ddmmyy formatting) #}
{% set price_with_no_cents = false %} {# Remove cents from being displayed in price #}
{% set date_format = 'mdy' %} {# Format the date is shown in if show_date is enabled.
m = 2 digit month, d = 2 digit day, y = 2 digit year, Y = 4 digit year #}
{% set hide_price = false %} {# Remove the price from displaying on label #}
{% set hide_description = false %} {# Remove the description from displaying on label #}
{% set hide_barcode = false %} {# Remove the barcode from displaying on label #}
{% set hide_barcode_sku = false %} {# Remove the System ID from displaying at the bottom of barcdoes #}

{# Enter Category IDs (found in Settings > Categories by clicking on the desired Category and looking at the id=number at in the URL for the Category)
into the appropriate section, separated by commas and enclosed in single quotes #}

{% set normal_label_categories = [''] %}
{% set alt_label_categories = [''] %}
{% set small_label_categories = [''] %}
{% set jewelry_label_categories = [''] %}

{# Normal Label (2.25x1.25) settings #}

{% set normal_description_font_size = '9pt' %} {# Default is 9pt #}
{% set normal_price_font_size = '20pt' %} {# Default is 20pt #}

{# Use the following if adjustments to the label position are needed. Positive and negative numbers work #}

{% set normal_top_margin = '0px' %}
{% set normal_right_margin = '0px' %}
{% set normal_bottom_margin = '0px' %}
{% set normal_left_margin = '0px' %}

{# For Vertical: Negative numbers move up, positive move down
For Horizontal: Negative numbers move right, positive move left #}

{% set normal_barcode_vertical = '0px' %}
{% set normal_barcode_horizontal = '0px' %}

{# Alt. Label (2.00x1.00) settings #}

{% set alt_description_font_size = '9pt' %} {# Default is 9pt #}
{% set alt_price_font_size = '12pt' %} {# Default is 12pt #}

{# Use the following if adjustments to the label position are needed. Positive and negative numbers work #}

{% set alt_top_margin = '0px' %}
{% set alt_right_margin = '0px' %}
{% set alt_bottom_margin = '0px' %}
{% set alt_left_margin = '0px' %}

{# For Vertical: Negative numbers move up, positive move down
For Horizontal: Negative numbers move right, positive move left #}

{% set alt_barcode_vertical = '0px' %}
{% set alt_barcode_horizontal = '0px' %}

{# Small Label (1.25x1.00) settings #}

{% set small_description_font_size = '9pt' %} {# Default is 9pt #}
{% set small_price_font_size = '7pt' %} {# Default is 7pt #}

{# Use the following if adjustments to the label position are needed. Positive and negative numbers work #}

{% set small_top_margin = '0px' %}
{% set small_right_margin = '0px' %}
{% set small_bottom_margin = '0px' %}
{% set small_left_margin = '0px' %}

{# For Vertical: Negative numbers move up, positive move down
For Horizontal: Negative numbers move right, positive move left #}

{% set small_barcode_vertical = '0px' %}
{% set small_barcode_horizontal = '0px' %}

{# Jewelry Label (2.20x.50) settings #}

{% set jewelry_description_font_size = '7.5pt' %} {# Default is 7.5pt #}
{% set jewelry_price_font_size = '6pt' %} {# Default is 6pt #}

{# Use the following if adjustments to the label position are needed. Positive and negative numbers work #}

{% set jewelry_top_margin = '0px' %}
{% set jewelry_right_margin = '0px' %}
{% set jewelry_bottom_margin = '0px' %}
{% set jewelry_left_margin = '0px' %}

{# For Vertical: Negative numbers move up, positive move down
For Horizontal: Negative numbers move right, positive move left #}

{% set jewelry_description_vertical = '0px' %}
{% set jewelry_description_horizontal = '0px' %}

{% set jewelry_price_vertical = '0px' %}
{% set jewelry_price_horizontal = '0px' %}

{% set jewelry_barcode_vertical = '0px' %}
{% set jewelry_barcode_horizontal = '0px' %}

{#
***End Custom Options***
#}

{% extends parameters.print ? "printbase" : "base" %}
{% block style %}

<link href="/assets/css/labels.css" media="all" rel="stylesheet" type="text/css" />

<style type="text/css">

body {
margin: 0;
}

{# Normal Label (2.25x1.25) CSS settings #}

.label.size225x125 .custom_margin {
margin: {{normal_top_margin}} {{normal_right_margin}} {{normal_bottom_margin}} {{normal_left_margin}};
}

.label.size225x125 .description {
font-size: {{ normal_description_font_size }};
}

.label.size225x125 .price {
font-size: {{ normal_price_font_size }};
}

.label.size225x125 .barcode {
position: absolute;
bottom: {{ normal_barcode_vertical * -1 }}px;
left: {{ normal_barcode_horizontal * -1 }}px;
}

{# Alt. Label (2.00x1.00) CSS settings #}

.label.size200x100 .custom_margin {
margin: {{alt_top_margin}} {{alt_right_margin}} {{alt_bottom_margin}} {{alt_left_margin}};
}

.label.size200x100 .description {
font-size: {{ alt_description_font_size }};
}

.label.size200x100 .price {
font-size: {{ alt_price_font_size }};
}

.label.size200x100 .barcode {
position: absolute;
bottom: {{ alt_barcode_vertical * -1 }}px;
left: {{ alt_barcode_horizontal * -1 }}px;
}
{# Small Label (1.25x1.00) CSS settings #}

.label.size125x100 .custom_margin {
margin: {{small_top_margin}} {{small_right_margin}} {{small_bottom_margin}} {{small_left_margin}};
}

.label.size125x100 .description {
font-size: {{ small_description_font_size }};
}

.label.size125x100 .price {
font-size: {{ small_price_font_size }};
}

.label.size125x100 .barcode {
position: absolute;
bottom: {{ small_barcode_vertical * -1 }}px;
left: {{ small_barcode_horizontal * -1 }}px;
}

{# Jewelry Label (2.20x.50) CSS settings #}

.label.size220x50 .custom_margin {
margin: {{jewelry_top_margin}} {{jewelry_right_margin}} {{jewelry_bottom_margin}} {{jewelry_left_margin}};
}

.label.size220x50 .description {
top: {{ jewelry_description_vertical }};
right: {{ jewelry_description_horizontal }};
font-size: {{ jewelry_description_font_size }}
}

.label.size220x50 .price {
top: {{ jewelry_price_vertical + 25 }}px;
right: {{ jewelry_price_horizontal }};
font-size: {{ jewelry_price_font_size }}
}

.label.size220x50 .barcode {
top: {{ jewelry_barcode_vertical }};
left: {{ jewelry_barcode_horizontal * -1 }}px;
}

.label.size5-7x1-9{
width:5.7cm; height:1.9cm; display:flex; align-items: center;
}
.label.size5-7x1-9 h1{display:none;}
.label.size5-7x1-9 .barcode{width:69%; padding: 1% 0 0 1%; height:auto;}
.label.size5-7x1-9 .barcode img{max-width:100%; height:auto;}
/*.label.size5-7x1-9 .barcode .ean8{display:block;}
.label.size5-7x1-9 .barcode .ean{display:none;}*/
.label.size5-7x1-9 article{height:auto; width: 29%; padding: 1% 1% 0 0;}
.label.size5-7x1-9 article p{margin: 0 0 5px; font-size: 6.5px;}
.label.size5-7x1-9 article .pricing p{margin:0;}
</style>
{% endblock %}
{% block content %}
<div class="labels">
{% for Label in Labels %}
{% for copy in 1..Label.copies %}
{% set size_specified = false %}
{% for category in normal_label_categories %}
{% if category == Label.Item.categoryID %}
<div class="label size225x125{%if Label.MetaData.title == 'none'%} notitle{%endif%}">
<div class="label size225x125 custom_margin">
{% set size_specified = true %}
{% endif %}
{% endfor %}
{% for category in alt_label_categories %}
{% if category == Label.Item.categoryID %}
<div class="label size200x100{%if Label.MetaData.title == 'none'%} notitle{%endif%}">
<div class="label size200x100 custom_margin">
{% set size_specified = true %}
{% endif %}
{% endfor %}
{% for category in small_label_categories %}
{% if category == Label.Item.categoryID %}
<div class="label size125x100{%if Label.MetaData.title == 'none'%} notitle{%endif%}">
<div class="label size125x100 custom_margin">
{% set size_specified = true %}
{% endif %}
{% endfor %}
{% for category in jewelry_label_categories %}
{% if category == Label.Item.categoryID %}
<div class="label size220x50{%if Label.MetaData.title == 'none'%} notitle{%endif%}">
<div class="label size220x50 custom_margin">
{% set size_specified = true %}
{% endif %}
{% endfor %}
{% if size_specified == false %}
<div class="label size5-7x1-9">
<div class="label size5-7x1-9 custom_margin">
{#<div class="label size{{Label.MetaData.size}}{%if Label.MetaData.title == 'none'%} notitle{%endif%}">
<div class="label size{{Label.MetaData.size}} custom_margin">#}
{% endif %}
{#<article>
<h1>{{ Label.MetaData.title }}</h1>
{% if hide_price == false %}
{% if Label.MetaData.price > 0 %}
<div class="price">
{% if price_with_no_cents == true %}
<p class="saleprice"><sup class="currency">$</sup>{{ Label.MetaData.price|number_format(0, '', '')|raw }}</p>
{% else %}
<p class="saleprice">{{ Label.MetaData.price|money|htmlparsemoney|raw }}</p>
{% endif %}
{% if Label.MetaData.msrp %}
<p class="msrp">MSRP {{ Label.MetaData.msrp|money }}</p>
{% endif %}
</div>
{% endif %}
{% endif %}
<p class="description">
{% if show_date == true %}
{{"now"|date(date_format)}}
{% endif %}
{% if vendor_number == true %}
{% for ItemVendorNum in Label.Item.ItemVendorNums.ItemVendorNum %}
{% if Label.Item.defaultVendorID+0 == ItemVendorNum.vendorID+0 %}
<span style="font-style: italic;">{{ ItemVendorNum.value }}</span>
{% endif %}
{% endfor %}
{% endif %}
{% if show_upc_code == true %}
{% if Label.Item.upc|strlen > 0 %}
<i>{{ Label.Item.upc }}</i>
{% endif %}
{% endif %}
{% if show_custom_sku == true %}
{% if Label.Item.customSku|strlen > 0 %}
<i>{{ Label.Item.customSku }}</i>
{% endif %}
{% endif %}
{% if show_manufacturer_sku == true %}
{% if Label.Item.manufacturerSku|strlen > 0 %}
<i>{{ Label.Item.manufacturerSku }}</i>
{% endif %}
{% endif %}
{% if hide_description == false %}
{{ Label.Item.description|strreplace('_',' ') }}
{% endif %}
</p>
</article>#}
{% if hide_barcode == false %}
{% if hide_barcode_sku == true %}
{% set hide_text = 1 %}
{% else %}
{% set hide_text = 0 %}
{% endif %}
<footer class="barcode">
<img class="ean8" src="/barcode.php?type=label&amp;number={{ Label.Item.systemSku }}&amp;ean8=1&amp;noframe=1&amp;hide_text={{ hide_text }}">
<img class="ean" src="/barcode.php?type=label&amp;number={{ Label.Item.upc }}&amp;noframe=1&amp;hide_text={{ hide_text }}&amp;encoding=code128">
<!-- <img class="ean" src="http://www.barcode-generator.org/zint/api.php?bc_number=20&bc_data={{ Label.Item.upc }}"> -->
</footer>
{% endif %}
<article>
<h1>{{ Label.MetaData.title }}</h1>
<p class="desc">
{% if show_date == true %}
{{"now"|date(date_format)}}
{% endif %}
{% if vendor_number == true %}
{% for ItemVendorNum in Label.Item.ItemVendorNums.ItemVendorNum %}
{% if Label.Item.defaultVendorID+0 == ItemVendorNum.vendorID+0 %}
<span style="font-style: italic;">{{ ItemVendorNum.value }}</span>
{% endif %}
{% endfor %}
{% endif %}
{% if show_upc_code == true %}
{% if Label.Item.upc|strlen > 0 %}
<i>{{ Label.Item.upc }}</i>
{% endif %}
{% endif %}
{% if show_custom_sku == true %}
{% if Label.Item.customSku|strlen > 0 %}
<i>{{ Label.Item.customSku }}</i>
{% endif %}
{% endif %}
{% if show_manufacturer_sku == true %}
{% if Label.Item.manufacturerSku|strlen > 0 %}
<i>{{ Label.Item.manufacturerSku }}</i>
{% endif %}
{% endif %}
{% if hide_description == false %}
{{ Label.Item.description|strreplace('_',' ') }}
{% endif %}
{{ Label.Item.ItemAttributes.ItemAttributes.attribute1 }}
</p>
{% if hide_price == false %}
{% if Label.MetaData.price > 0 %}
<div class="pricing">
<p>{{ Label.MetaData.price|money }}</p>
</div>
{% endif %}
{% endif %}
</article>
</div>
</div>
{% endfor %}
{% endfor %}
</div>
{% endblock content %}