How does the app affect standard templates created in the store?
Our Split Payment & Deposit app does not create any additional email templates and does not change any of the old ones.
Instead, it uses a custom_message variable that is used for showing messages here. If your Draft Order Invoice template has been changed, please be sure that it contains the custom_message variable. If you want to inform your customers, it is necessary to add this variable, as shown in the following example:
{% if custom_message != blank %}
<p>{{ custom_message }}</p>
{% else %}
<p>DEFAULT MESSAGE</p>
{% endif %}
You can place this code into a template to use the defined default message.